1973

5.7

2015

5.1

2009

5.4

2000

6.4

2018

5.6

1979

6.3

1999

6.7

1999

5.5

1985

6.2

1941

6.7

1940

6.5

2024

6.2

1963

7.1

1988

6.1

1959

6.8

2003

5.4

1973

6.7

1989

6.9

1951

6.1

2017

5.0