I'd never actually considered this question before. An interesting study, to be sure.
I live in an area with very high housing prices (though it's no San Francisco!), so my numbers are looking more like Australia/NZ ratios above than other US reports.
I've owned two properties. The first, bought in 1999 (just before local prices started to skyrocket), was for 3x my annual income. I made no down payment on that, btw.
In 2005 I sold that TH and bought a SFH (which, btw, is way more house than I need, but it was the only way to get a yard and a garage). The purchase price was nearly 7x my salary (from two jobs) that year. I did, however, put all the proceeds from the sale of my first house into a 40% down payment. I consider that free money, so the effective purchase price for me was 4x my salary. I'm now down to one (higher paying) job, and my house has risen in value only slightly. The current value is 5.6x my salary.