"Folded to River Bet %" too high?

[Sully]

I've never paid too much attantion to this statistic, but have started noticing how useful it can be. Not sure what an "ideal" number should be, but it seems that the better players in the higher Party Poker games tend to be around 33%. My number is just below 50%.

The rest of my numbers seem to be in line with what people recommend (for whatever that's worth).

Am I chasing and missing too many draws? Am I just being taken advantage of at the river? Combination of both?

Some other stats that might help:
VpIp: 16.25% PFR: 8.73%

Went to showdown 32% Won 56%

My aggression on different streets is:
Flop - 2.06 Turn - 2.19 River - 1.86 Total - 2.06

Can anyone figure out anything from this? I know that stats by themselves mean nothing, but I know I have some leaks, and this is starting to stick out as something I might need to address.