1967

4.4

1983

9.5

1972

6.1

2000

7.1

2006

6.9

2005

7.1

2005

6.2

1998

7.3

2001

2.9

1979

0.0

1990

4.8

1981

2.0

1998

6.5

1999

5.6

1998

6.7

2001

6.7

2006

5.5

1998

5.0

2014

7.5

2002

6.0