2006

6.1

2005

8.8

2000

6.2

2005

7.6

2002

8.2

6.7

1993

0.0

1999

7.1

1995

7.7

1994

8.3

1999

8.5

1984

7.3

1979

6.9

2020

5.0

2005

5.0

1997

5.7

1999

7.7

1997

6.8

1992

6.8

1978

6.9