1995

7.3

1951

7.6

1950

8.1

2003

7.8

2001

6.2

2001

7.4

1997

6.9

1962

8.0

1998

6.4

1963

4.0

1984

5.6

2002

6.2

1997

6.8

1969

7.5

2000

4.8

1980

6.4

2001

6.4

2007

6.3

1967

4.4

2023

6.7