1966

6.5

1996

7.3

1959

8.1

2000

7.6

1923

7.5

1982

7.2

1996

7.0

1982

6.2

2006

6.8

2014

7.4

1976

7.6

1986

5.6

2000

5.8

1972

6.4

1992

5.7

2005

6.7

2003

5.9

1960

6.3

1999

7.6

1934

4.9