1993

7.2

1994

7.5

2005

7.2

1982

6.2

1963

4.0

1926

0.0

1976

0.0

1969

1.0

2006

7.6

1985

6.1

1969

6.7

2003

5.3

1970

4.2

1991

2.0

2008

3.2

1953

4.6

2002

6.1

2000

6.5

1982

7.3

1995

7.1