1964

7.6

2013

6.4

1970

7.3

1995

6.3

2001

7.0

2003

6.3

1965

6.8

1969

7.3

1977

0.0

1999

7.1

1959

8.1

1955

4.3

1956

6.8

1915

5.0

1986

5.9

2013

4.6

1949

6.0

1975

0.0

1975

8.9

1983

6.3