2006

5.1

1985

5.9

2014

7.0

2007

6.1

1990

6.6

2013

6.8

2009

6.4

2010

6.6

1984

7.2

1999

6.0

1980

7.7

1997

5.4

2021

7.7

1946

6.5

2007

5.4

2013

6.7

2011

4.7

1996

5.8

1990

6.0

1990

6.1