Mihir, it's Nathan. I kind of put you to probably three things. One, and we kind of went through this last quarter and at various times last year, but we did incur significant, I think, if my memory serves me about $25 million for the full year, and pension related costs and settlement charges last year, which increased the expense level last year. The other thing, in our long term incentive plan, the financial performance in 2021, 2022, particularly on an ROE basis, was very, very strong. And that has led to, additional expense under our performance base long term performance based comp plans, which has added to that a little bit versus years like 2020, with COVID, and increased losses, there were the performance based compensation expense was much lower as a result of performance that that was, while still generating, I believe 10% or at least that year, not at the level that we've experienced subsequent to that. And then I think the third is one that we started talking about as early as 2019, which is just making continued investments in our infrastructure, in our data and analytics and in our ability to kind of perform well and be in the right positions in this market. So I think the combination of those things has led to an increase in expense last year, a little bit this year. But I think one of those things is really due to the high performance that we've had from an ROE standpoint, if we do have periods that are more, as expected, some of that would just naturally be less as well.