2004

8.1

2000

8.2

2004

5.9

2002

5.0

1991

5.3

2001

6.8

1996

6.0

2005

7.7

2006

6.2

2001

7.1

1985

6.1

2007

6.1

2003

6.2

1991

6.4

1991

6.5

1996

6.6

2003

5.5

2018

7.1

2005

5.5

1948

5.9