2005

6.2

2005

6.8

1999

7.2

2006

7.1

2007

7.3

2007

6.9

2006

6.8

1985

7.1

1990

5.8

2006

6.7

2001

7.4

2002

7.3

2019

6.6

1963

7.4

1993

6.7

1995

8.0

1999

7.6

2018

6.2

1994

5.3

1940

6.5