Look at the excel file linked to at http://news.bbc.co.uk/1/hi/business/8456116.stm

Summary.

105 - 9 passes 9 fails

120 - 48 passes 35 fails

130 - 29 passes 22 fails

Estelle - 26 passes 17 fails

Rapid - 46 passes 43 fails

It's not clear whether these include fails which are retested and then passed (I would assume so). Therefore I would say the number of passes is representative of numbers of each on the roads in 2007. I think most of these MOT's will have been done at Dave's garage

You're probably right about the MOT'S being done where I work, the garage owner often comments that he hadn't seen a rear engined Skoda for years until I started there, now he's inundated with the damned things!