1978

3.5

2008

7.5

2018

7.8

2006

0.0

1971

6.0

2001

5.6

2000

7.0

2003

8.2

1998

6.9

1981

5.6

1997

8.1

1966

7.6

1983

7.9

1998

7.4

2005

7.1

2000

5.3

1963

7.9

1966

7.5

1988

7.7

2000

7.7