I started tracking the values of twelve properties in my region, including mine: ten in my city, one in the same county, and one in a different county. My criteria for tracking: did I work with the individual homeowner, were we close in age? One I stopped tracking last year because the house was sold. One condo, one townhome, ten houses. Replaced that with a 3 bedroom house one town over.

COUNTIF(Houses with depreciating equity): 8
My equity went up by 0.17% over two years. That's with a 20-year mortgage, then a 12-year mortgage. Only two people refinanced over that two-year period. One refinanced four times over 100 months prior to May 2010, so she's probably due.
Median mortgage paid: $10702.96 from inception of mortgage. $16167.38 average.
Loan to Value ratios vary from 109.79 to 43.62.
Percent of mortgages paid year to date: 2.6683% to 17.2567%. I'm ranked fifth from the top, not bad for nine months mortgage.
Median mortgage balance remaining: $257614.13; average is $253945.84.
The Median Mortgage Debt in my state is $225581. This is one of the most expensive counties for real estate.

Median equity: $64205.97; average $69271.85
Median Value of Home Equity nationwide is $181189, so you can tell we suck bananas here. Lengths of mortgage range from 179 months to 9 months. Lengths of home ownership range from 179 months to 70 months.

Median equity percentage: 21.07%; average 21.78%.