1969

0.0

1955

7.5

2001

7.6

1950

8.1

1993

7.4

1950

8.1

1990

7.8

2003

7.6

1994

7.4

1994

4.5

1983

4.5

1970

2.8

1987

0.0

1951

6.5

2002

6.6

1964

6.0

2006

8.2

1962

7.9

2006

6.4

1999

6.8