1988

4.9

1966

7.7

1977

5.2

1985

6.9

2005

7.7

1954

8.5

2014

4.6

1989

6.6

2003

7.2

1973

5.6

2006

6.8

1984

7.2

2002

7.5

2000

7.4

0.0

2005

6.3

1991

0.0

2001

5.5

1978

6.4

1978

6.7