1985

6.3

2000

7.0

1974

6.2

2001

6.6

2003

8.7

1990

5.7

1986

6.7

1976

8.0

1998

7.4

1997

8.1

2001

6.0

1999

7.9

2021

8.9

1976

7.0

1982

7.3

1992

6.7

1966

6.6

1968

7.4

1986

7.9

1982

5.1