Thank you, Roger. As Roger has highlighted, we had another good quarter closing a great year for us, with record demand from our memory and logic customers combined across our entire product portfolio. While the current geopolitical landscape and economic environment are creating volatility in the markets and uncertainty on the near term, as mentioned before, we still expect overall growth in 2019. At the very end of last year, we saw the continued slowdown of memory end market demand as well as some demand reduction in the logic end markets, primarily driven by the mobile and the server markets. And this translated into push outs of our planned systems to both memory and logic customers from the first half of 2019 in their attempt to regain balance of supply against demand. The NAND market, as mentioned in prior quarters, remains in an oversupply situation and is going through a digestion phase after a period of significant 2D to 3D conversions, yield improvements, and wafer capacity additions. DRAM is experiencing softening of bit demand, largely driven by decreased demand in mobile market as well as some inventory correction in the server market. All of this has resulted in some push outs of planned shipments by memory customers in the first half of 2019. Customers have indicated that they believe there will be a recovery in the second half of the year as they expect that inventory levels will be managed down swiftly. In logic, while we see some softening in DUV demand which is primarily driven by the mobile market, we still expect strong demand in support of the ramp of 10 and 7 nanometer nodes. We also expect to see strong growth in EUV demand supporting customers' ramp of 7 and 7 plus nanometer nodes as well as a transition to the 5 nanometer node. Although future developments in the macro environment can impact our current view, we currently expect logic demand to increase around 50% year-over-year and memory to be down around 20% year-over-year. We still expect single digit percentage growth of Installed Base revenue. In summary, 2019 will be a growth year, largely driven by logic. On the ASML product side let me start with an update of our EUV business. In EUV, we continue to make solid progress as evident in the positive public comments from our logic and memory customers on the use of EUV in their most advanced nodes. Logic customers are installing systems in support of volume manufacturing for their 7 and 5 nanometer nodes. DRAM customers are also working on qualifying EUV for their future nodes. And this year we expect the first commercial EUV enabled chip to reach the consumer market. In 2018, we demonstrated over 145 wafers per hour and we are accelerating our EUV roadmap to deliver 170 wafers per hour on our NXE:3400C with first shipments planned in the second half of 2019. The NXE:3400C will also include a number of innovations that will further improve availability. As Roger mentioned, we shipped six systems in Q4, which translates to a total of 18 EUV shipments in 2018. With the five orders booked this quarter, our shipment plan of 30 systems for 2019 is covered. In DUV, we shipped 189 new systems in 2018, an increase of 17% over 2017 and we were able to further increase our output in support of the demand from both logic and memory customers. And we continued ramping our latest immersion system, NXT:2000 with a record time to achieve mature customer yields. Our applications portfolio has continued to see strong adoption in all market segments. Our latest YieldStar system continues to gain adoption at memory customers, following the strong adoption we saw in logic. Integrated products using the combined technology of HMI and ASML are being evaluated at multiple customer sites to help improve customers' yield and time to market. So to summarize 2018, our fourth quarter came in slightly above our guidance and we nearly achieved 11 billion sales for the year, which was a milestone originally set for 2020. Although 2018 was a very good year from a financial perspective, I think it was also a milestone year in terms of technology innovations across all our products. This not only provides our customers with higher value solutions, but it also fuels our future growth. Turning to 2019, we currently see some uncertainty in the market but after a long period of strong capacity investments, driven by healthy demand over the past years, it is normal to see a period of digestion, which we expect in first half of 2019. With regards to the markets we serve, our customers responded quite late in Q4 to slowing demand in their end markets by delaying deliveries of litho systems from the first half of 2019 to balance supply and demand. We now see our first half of 2019 lower than the second half of 2018, with the reduction being roughly an equal split between memory and logic. The fundamental drivers of high performance compute, with associated high performance memory and data storage, are still in place and our customers clearly indicated the need for a strong shipment pattern in the second half of 2019 in support of their 2020 business potential. The demand in the second half of 2019 could therefore be 50% higher than the first half of the year. For 2019, the logic segment is expected to be the growth driver, investing strongly in technology transitions as well as production capacity for their advanced nodes. As we have consistently done in prior slow downs, we sustain or even accelerate our investments in R&D to deliver on the leading edge technology when the market turns up which has been and will be the key driver to secure our long-term growth. We expect to increase our investments in R&D to €1.9 billion for 2019. We reiterate that we see market demand that supports yet another year of growth for ASML in 2019 with significantly stronger demand in the second half of the year. As Roger explained, we see similar development in our profitability, with lower margins expected in the first half of 2019 improving towards our 2020 target of over 50% as we exit the year. Despite some uncertainty in the current environment, we remain confident about our sales and profit targets for 2020 and beyond as we communicated during our Investor Day in November last year. We are happy to underline this confidence by our proposal of a 50% increase in our dividend. And with that we would be happy to take your questions.