2017

6.9

2007

4.0

1996

6.4

1970

7.1

1988

6.3

1992

7.4

2003

5.9

2005

5.3

2002

6.8

2001

7.3

2005

6.3

1964

7.1

2017

5.0

2007

3.3

2010

3.9

2009

6.6

2014

6.7

1997

5.9

1994

7.6

1980

6.6