!

I could not get data after 2014 but the rate of family formation is dropping... I did not look for data but I am thinking the rate of early retirement and/or retirement into a stable financial situation is dropping. On top of that I will guess that the number of families that want to RV as a family and the number of retirees who want to RV could be dropping. The combo of a smaller target demographic (families and retired) along with a smaller rate of interest in RV lead to the decline in sales.

Just my guess