1979

8.3

2006

0.0

2003

6.4

1983

6.4

1983

5.7

1988

6.0

1990

6.1

1977

7.1

2002

6.8

1993

7.0

1986

6.3

2001

5.6

2005

6.4

2006

6.3

2006

4.9

1997

6.9

1972

7.8

2019

6.0

1991

7.6

1996

7.3