From Texas Surplus Lines:

Writing in support of the law, Ray Lehmann, co-founder of public policy research organization R Street Institute, notes that private flood insurance, which includes non-NFIP admitted policies and surplus lines policies, in Texas reached $63.22 million in 2018, up from $53.51 million in 2017 and $31.77 million in 2016. During the same time, the US private flood insurance market recorded $701.80 million in 2018, compared to $641.88 million in 2017 and $412.62 million in 2016, according to data from S&P Global Market Intelligence.