1937

0.0

1977

0.0

1980

6.1

2015

6.9

1999

8.4

1972

7.1

2001

7.4

1995

6.6

1990

7.8

2002

7.3

1972

7.8

1962

8.0

1940

7.8

1987

8.1

2004

7.9

1997

7.4

1986

7.5

1953

8.0

1955

7.6

1983

7.2