Useful articles for stats

“New Zealand was a nation of cyclists in the past but saw a major decline beginning in the early 1990s. The number of students biking to school plummeted from 19 per cent to 3 per cent, and the annual number of cycling hours for an adult has more than halved, falling from 13 to 5.”

Since the early 1990’s? That is recent history. I wonder how the stats correlate to the explosion of cars in NZ?