2014

7.2

2016

5.9

1990

7.5

1987

7.6

2001

6.4

2006

6.2

2008

7.8

1968

6.6

2007

6.7

1992

7.4

2014

7.8

2008

5.9

1982

6.2

1996

6.7

2018

7.6

2016

7.3

1988

6.0

2015

7.2

2014

5.4

2009

6.5