2003

4.0

1994

6.5

1961

7.7

1971

7.2

1999

7.1

1981

7.1

1999

7.2

2006

7.1

1937

0.0

2002

5.9

1999

6.8

2001

6.2

1997

7.8

2000

6.5

1960

7.3

2002

6.3

1978

5.0

2002

6.6

1969

6.3

1932

7.4