1969

6.1

1974

4.7

1990

4.4

1999

2.9

2007

5.5

1977

3.5

1967

5.1

1975

2.3

2004

2.7

1973

7.3

2005

4.9

1977

3.6

2018

0.0

1981

6.2

1982

3.7

1982

6.0

1981

4.6

1983

3.4

2006

5.5

1993

7.0