1997

6.8

1990

6.7

1976

3.3

1995

4.4

2007

6.7

2015

4.3

1967

5.3

2008

0.0

1974

4.8

1990

4.6

1975

2.4

1999

3.8

1999

5.6

1981

6.4

2006

6.3

1994

3.2

1977

3.8

1997

6.5

1982

4.9

1979

5.3