1991

5.0

1955

7.2

1975

7.5

1985

6.4

2009

5.5

2008

7.7

1984

6.8

2019

8.0

1987

6.5

1994

6.5

1982

7.6

1985

5.3

1966

7.5

1974

7.2

1943

8.2

2006

6.3

2007

5.6

2010

6.1

1978

6.1

2010

8.4