2000

10.0

1981

7.0

2008

6.1

1969

6.4

2013

7.5

2002

6.9

1970

6.2

1978

6.7

1968

7.4

1964

5.6

1933

6.6

2014

6.0

1992

4.7

1991

10.0

1981

6.4

1984

7.1

1980

0.0

1960

5.6

2012

5.7

1959

5.4