2008

4.7

2012

7.0

1991

5.9

2003

7.3

2009

6.1

2000

7.1

2010

6.6

2002

5.0

1972

7.7

2012

7.7

1990

6.3

2008

5.8

2021

7.8

2012

7.7

2009

7.7

1999

6.1

1998

6.4

1997

7.5

2011

6.7

2007

5.7