1971

6.8

1969

5.1

1962

6.9

2001

6.0

1997

6.1

1966

6.5

1974

7.1

2015

6.0

1916

7.1

1965

6.8

1932

6.6

2011

7.2

1991

7.2

1964

7.1

1968

7.5

1967

6.5

1956

7.1

2002

5.8

2016

6.1

2014

4.4