1989

0.0

1973

7.5

1984

7.0

1990

7.7

1991

6.8

2010

5.0

1956

6.9

1932

6.0

1964

6.2

2014

6.2

1997

6.1

2007

6.7

2007

6.8

1987

0.0

1989

0.0

2006

4.0

2007

5.1

1968

7.6

1976

6.8

1962

4.9