2005

7.1

1964

7.6

2001

7.9

2000

6.0

1990

7.0

1999

8.5

1975

8.4

1995

8.0

2025

0.0

1994

8.5

0.0

2021

6.2

1955

7.5

1940

7.9

1983

7.2

1930

7.3

1986

7.9

1972

8.7

1974

8.6

2002

6.7