1984

6.6

1964

7.1

1961

7.6

1959

8.1

2014

6.5

2006

7.2

2015

6.1

1970

7.0

1985

7.3

1990

6.3

1995

6.2

1958

6.8

1952

7.5

1969

7.6

1955

7.3

1916

6.7

1934

6.5

1974

7.5

1987

5.7