Mike, this is Dan. Thank you so much for the question. And you're right. We decided to share that data on the loss ratio because we thought it was very compelling. And what you're seeing there is a function of time, more than anything else. As the business has time for policyholders to mature in each state, you can see the loss ratio performance trend really be quite strong.
So then the question around state expansion, Mike, is a good one because you're right, if we just enter a state, and prioritize expansion, without prioritizing the overall portfolio, it will put pressure on the loss ratio. So for us at Root, it's not when we enter a state. It's how we enter the state. And we've done that in a couple of different ways. First is we've really fortified our team. We've invested a lot on the team side to bring in professionals who have really strong state management experience in some of the states where we are not today.
We brought in a new VP of product and pricing in late August with nearly 3 decades in the industry. We brought in a new head of claims, who understands the pitfalls that you can find when you enter a state and we also have the learnings from the 30 states that we've already entered, that we can apply in large part to the states that we are not yet writing business in.
So we are, frankly, very bullish on not just turning or flipping the switch and saying, let's go into 48, 49 states immediately, but let's do it the right way. And I think that what you'll see as we enter 2021 is we'll be very thoughtful about that. We'll be prudent stewards of capital. We'll be testing because that's what we do at Root. We're very data-driven. We're very test-oriented. And so you'll see us do that pretty consistently. And the bigger difference versus, say, 2017, 2018 or 2019 is we have this very nice installed base of in force premium in states that are already maturing, as you can see on Page 12 of the shareholder letter, and are going to continue to mature next year.
And that's very powerful for us. Our largest state is Texas, Mike. And just look, in Texas, in 2020, we took base rates down. And year-to-date, we've seen loss ratio improvement of about 36 points on 59% earned premium growth. That's quite significant when you look year-over-year at a state which is our #1 state and really shows the benefits of maturity. So you've got that installed base to support the loss ratio as we dip our toe in some of the state expansion.