One-third fewer teenagers were pregnant in 2001 than three decades earlier, according to Statistics Canada.

The survey examined pregnancies between 1974 and 2001.

Pregnancies among women under the age of 20 fell from 45.5 pregnancies for every 1,000 women in 1974, to 30.6 in 2001.

As it was in 1974, the highest pregnancy rates were reported in women aged 25 to 29. However, the number of pregnancies was down from 152 for every 1,000 women to 124 in 2001.

The survey also suggests that women are becoming pregnant at an older age.

Until 1997, the age group with the second highest rate of pregnancy had been women aged 20 to 24.

However, women aged 30 to 34 moved into second place in 1997. By 2001, women in this age group had 108.1 pregnancies for every 1,000 women, compared to 89.8 for women in their early twenties.