2002

7.2

1985

6.6

1955

6.5

1996

5.8

2005

5.8

2018

6.7

2015

7.6

1987

4.6

2001

4.7

1990

6.5

1961

6.1

2007

4.1

1953

6.9

1985

7.1

1931

7.5

1940

6.2

1943

6.2

1971

5.5

1964

6.1

1970

5.8