1985

6.3

2000

7.0

1974

6.1

2001

6.6

2003

8.7

1990

5.7

1986

6.6

1976

8.0

1998

7.4

1997

8.5

2001

6.0

1999

7.9

1969

7.3

2021

5.0

1992

7.2

2003

6.5

1989

5.8

2004

6.9

2003

8.0

1999

0.0