Thanks, Mike, and good morning, everyone. I'll start by focusing on our full year results and give a little color on the fourth quarter toward the end of my remarks. To be consistent with previous reporting, I'm excluding the impact of unrealized noncash mark-to-market adjustments on our commodity hedges, which resulted in an unrealized gain of $43.1 million in fiscal 2021 compared to an unrealized loss of $400,000 in the prior year.
The contracts associated with the open commodity hedges at the end of fiscal 2021 are expected to mature over the course of the fiscal 2022 heating season, and the valuation of the hedges is subject to change as commodity prices fluctuate. In addition to the unrealized adjustments on our hedges, I'm also excluding certain other noncash adjustments in both years as well as a loss in debt extinguishment resulted in the refinancing of our 2024 and 2025 senior notes and a $4.3 million charge recorded in the fourth quarter of 2021 related to the partnership's withdrawal from a multi-employer pension plan. We have included each of these items and a reconciliation of net income to adjusted EBITDA and in the press release and our public filings.
Excluding these items, net income for fiscal 2021 was $101.9 million or $1.62 per common unit compared to $62.3 million or $1 per common unit in the prior year. Adjusted EBITDA for fiscal 2021 increased $22 million or 8.7% to $275.7 million compared to $253.7 million in the prior year. As Mike indicated, the improvement in earnings was driven by several key factors, including an increase in volumes sold, unit margin expansion and operating efficiencies that contributed to lower expenses on a per gallon basis. Retail propane gallons sold in fiscal 2021 were 419.8 million gallons, which was 4.2% higher than the prior year, primarily due to an increase in weather-related customer demand during the most critical months of the heating season, an increase in commercial and industrial demand resulting from the easing of COVID-related business restrictions and an improving economy and positive trends in our customer base growth and retention initiatives.
With respect to the weather, average temperatures across our service territories for fiscal 2021 were comparable to the prior year. But during the most critical months of the heating season, which is December to February, average temperatures were 7% cooler than the same period in the prior year and contributed to an overall increase in heat-related demand and overall volumes sold. Higher volumes were experienced across all customer segments in fiscal 2021. In the commodity markets, wholesale propane prices increased steadily throughout the year, reflecting lower U.S. inventories as domestic demand and exports outpaced production. Overall, average wholesale prices for the year were $0.88 per gallon, basis Mont Belvieu, which was 98% higher than the prior year. In the other part of fiscal 2022, wholesale prices have contributed -- have continued to rise as the nation's inventory levels remain approximately 15% below average levels for this time of the year. Currently, propane prices seem to be somewhat range bound between $1.35 and $1.45 per gallon.
Mike will provide some additional color on the propane environment after my remarks. Excluding the impact of the mark-to-market adjustments on our commodity hedges, total gross margin of $760.2 million for fiscal 2021 increased $34.8 million or 4.8% compared to the prior year, primarily due to higher propane volumes sold and higher unit margins. Propane unit margins for fiscal 2021 increased about $0.02 per gallon or 1.2% compared to the prior year due to effective margin management during a rapidly rising and challenging commodity price environment. With respect to expenses, combined operating and G&A expenses increased $13.4 million or 2.9% compared to the prior year, primarily due to higher volume-related variable operating costs and higher variable compensation due to the higher earnings, partially offset by a decrease in accruals for self-insurance liabilities and bad debt expense.
Our recent investments in new technologies for our drivers and service technicians has enhanced the customer experience and also contributed to operating efficiencies that led to a reduction in operating expenses per gallon of more than $0.02. Net interest expense of $68.1 million for fiscal 2021 decreased $6.6 million or 8.8% compared to the prior year, primarily due to lower average debt outstanding, coupled with a decrease in short-term benchmark interest rates, our revolver borrowings and the impact of the refinancing of 2 tranches of senior notes at lower rates which was completed in May. The senior note refinancing will result in net cash savings of approximately $7 million annually, extend our average debt maturity profile by more than 3.5 years and push the overall weighted average debt maturity to nearly 8 years. In addition, with this opportunistic refinancing, we've shifted $125 million of debt within our capital structure from bonds to the revolver, which not only decreased our interest requirements will also allow for efficient debt repayments in the future to facilitate our debt reduction strategy. Total capital spending for the year $29.9 million compared to $32.5 million in fiscal 2020. The lower level of spending was a result of the investments that we made in the prior year to upgrade the handheld technology utilized by our field personnel.
And now turning to the fourth quarter results. Consistent with the seasonality of our business, we typically report a net loss for the fourth quarter. Excluding the multiemployer pension plan withdrawal charge that I mentioned earlier, as well as certain other noncash adjustments in both years, we reported a net loss of $37 million or $0.59 per common unit compared to a net loss of $41.7 million or $0.67 per common unit in the prior year. Adjusted EBITDA for the fourth quarter of fiscal 2021 was $300,000 compared to $5.5 million in the fourth quarter of fiscal 2020. Total gross margin increased $4.5 million or 4% due to a combination of higher volumes sold, higher unit margins and an increase in service-related activities resulting from tank sets in support of improving customer base trends.
Combined operating and G&A expenses increased $9.5 million or 9.1% due to an increase in variable operating costs in support of higher demand and higher payroll costs. Our prior year expenses benefited from considerable savings from the operational plans that we developed and implemented to address the potential different customer demand scenarios resulting from COVID-19, including a temporary reduction to our manpower.
And now turning to our balance sheet. As Mike mentioned, we repaid nearly $88 million of revolver borrowings during the fiscal year with cash flows from operating activities. As a result of the debt repayment and the increase in adjusted EBITDA, our consolidated leverage ratio for fiscal 2021 improved to 3.96x. We remain focused on utilizing excess cash flows to further strengthen the balance sheet as we trend towards our target leverage profile of 3.5x debt-to-EBITDA and as opportunities arise to fund strategic growth. From a liquidity position, we have ample borrowing capacity under our revolver to fund anticipated working capital needs for the upcoming heating season and to support our strategic growth initiatives.
With that, I'll turn it back to Mike.