1987

6.2

2021

6.3

1966

6.3

1985

6.5

1982

6.4

1984

7.7

2011

5.6

1983

6.7

2015

6.4

1964

6.5

2006

5.6

1979

6.6

1990

7.0

2010

5.2

1972

7.1

2008

5.4

2007

6.7

1951

7.8

2020

5.8

1932

7.5