1988

4.9

2001

8.2

2005

7.7

1954

8.5

2000

8.1

1988

6.1

1996

6.5

1986

6.3

1983

5.5

1989

6.8

2014

5.9

1980

5.3

1989

6.6

1973

5.6

1996

6.1

1991

0.0

2006

7.5

2008

6.8

2004

5.2

1982

1.0