2004

8.0

2000

7.6

2005

7.4

2004

7.4

2001

7.8

1993

7.0

1985

7.7

1990

6.4

1996

6.7

1957

5.7

2013

3.5

2005

7.4

2007

6.7

1975

0.0

1992

7.1

2007

7.5

2021

6.6

1973

4.8

2002

6.3

1995

8.0