1969

4.5

1997

6.1

2006

4.4

1966

3.5

2000

5.7

1996

6.6

2022

6.7

1946

7.7

1986

7.6

2001

7.4

1992

7.4

1998

4.4

1998

6.6

1964

3.0

1990

6.5

1997

5.1

1967

6.2

2007

6.3

2006

4.4

2016

6.5