I have a worksheet with ~10 columns and a 1000 rows.

In column F, I have a date that has a range of several years.
In column H I have a value, which sometimes is 0 or negative.

I need two formulas:

1) I would like to create a formula that would take the average value (from
column H) providing it was greater than or equal to 0 for a given year. So
for 2007 the average value is, say 10. For 2008, 12, etc....

2) I would like the second formula, simple count the n that went into
determining the average.