Condo sales in the 1st half of 2012

Many neighborhoods are showing significant increases in the condo median sales price, and this appears to be accelerating. However, as an example of how statistics are not 100% reliable, the chart shows no appreciation for Pacific and Presidio Heights condos over the past year: I believe there was indeed significant appreciation on par with most other nearby affluent areas, but the statistic is reflecting other factors, such as different inventories for sale during the two periods being compared.