year

Increasing rate

1980-1999

7.8 5.2 9.1 10.9 15.2 13.5 8.8 11.6 11.3 4.1 3.8 9.2 14.2 13.5 12.6 10.5 9.6 8.8 7.8 7.1

2000-2012

8.0 7.5 8.3 9.5 10.1 10.4 10.7 11.4 9.6 9.2 9.2 10.3 9.2 7.8