1991

4.5

1999

7.5

1988

7.8

2003

6.6

2025

0.0

1982

6.3

2008

3.2

2002

5.7

1972

6.3

1937

6.9

2000

7.4

1997

4.2

1991

5.3

1969

6.5

1985

5.8

2004

6.7

2002

6.3

1966

5.9

2005

5.0

2002

6.4