1987

6.0

2006

6.1

1977

7.2

2011

7.1

1983

7.1

2006

6.7

2017

6.8

2007

6.9

1962

7.7

2003

6.2

2017

7.4

1969

7.5

1935

7.4

1976

7.0

1961

7.9

1977

7.9

2015

6.6

1986

7.1

1940

7.0

1989

7.5