1983

5.5

2006

6.9

2000

8.1

2014

5.9

1989

6.6

1991

0.0

2003

7.2

2015

10.0

2015

6.4

1980

5.3

1982

1.0

2002

7.5

2000

7.4

2005

7.7

1954

8.5

2000

4.4

2005

6.9

1992

6.4

1991

0.0

2005

6.3