1931

0.0

1977

7.4

2005

6.3

2013

8.2

2000

7.1

2007

6.9

1987

5.6

2002

6.4

1988

5.8

1995

7.3

2002

6.9

1950

6.8

2022

6.1

2002

6.1

1969

1.0

1979

5.3

2001

6.8

2001

6.9

2006

5.1

2003

6.6