Belt up



This is a chart of pedestrian fatalities as a percentage of all fatalities from 1972 to 1992 (nothing special about the years, ten or so either side of the magic date, the source is here if you want it. Notice what happens to the trend between 1982 and 1983. Jan 1 1983 was the date on which front seat belt wearing was made compulsory for car drivers in the UK.

OK, the missus says I'm cheating by choosing the range I have, so here's the whole thing: