2013

3.2

1987

6.5

1977

6.8

1961

4.8

1983

4.3

1969

6.0

2002

5.7

1999

5.7

1955

6.3

1941

6.8

2014

2.2

1960

6.6

1996

6.0

1953

6.6

2008

4.0

1958

5.0

1988

6.9

1963

5.0

1990

6.2