Is happiness U-shaped?

According to research at the NBER, the life-cycle of humans these days contains a fluctuation in happiness. We start out our life relatively happy, and it declines gradually to a point, and then starts rising, which looks like a “U” shape on a graph. The bottom point for men is 49, and 45 for women. I’m just at the point where things should start looking up. Hope they are for you.