1979

7.7

1997

5.4

1976

4.2

1996

0.0

2009

5.8

1992

6.3

2000

5.9

1963

6.9

1989

5.7

1973

6.4

2013

6.7

1966

5.6

1996

6.3

1999

6.1

1995

6.8

1993

3.8

1991

0.0

1992

0.0

1997

0.0

2000

5.0