1975

6.0

2006

6.6

2009

0.0

1969

6.3

1984

5.4

2008

7.0

1988

7.4

2001

6.9

2000

5.5

1994

7.5

2015

3.2

1996

6.8

1949

6.7

1985

3.3

1969

8.0

1983

6.9

2009

0.0

2025

9.0

1975

6.2

2014

6.7