1995

7.8

1992

6.9

2021

10.0

1974

7.0

1999

6.9

1984

7.2

1972

6.4

2001

7.5

1975

6.9

1973

6.2

2003

8.5

2014

6.0

1985

6.7

6.5

1994

6.8

1971

6.8

1962

6.8

2000

6.2

2006

6.3

1966

5.6