2004

5.3

1979

6.7

1999

6.8

1994

5.7

1998

6.1

2007

6.2

1983

0.0

1994

6.7

1998

5.2

1975

7.3

2005

6.4

1978

5.6

1982

6.5

1987

6.3

2012

7.4

1978

4.5