Way more than necessary

O K I have been searching for this number for a while now, and both T and I came up with it today.
What our percentage of rainfall ( average to date : year to date) is.
I know it's been a wet year. I was thinking it was 150% at most;
turns out it's more like 164%.
We've gotten half again as much rain as average.
And it's going to rain tomorrow.