1984

6.9

2005

5.6

1995

6.1

2000

3.5

2019

7.3

1994

7.3

1972

6.2

2006

6.4

2007

5.8

1979

0.0

2009

5.6

0.0

1977

7.3

2005

5.9

2003

2.1

2003

3.9

2004

5.9

1976

4.8

1996

6.3

2007

5.2