2020

7.7

2014

7.3

2011

7.6

2014

7.0

1999

7.9

1971

7.9

2001

7.6

2013

7.1

1983

8.1

1986

7.7

2016

7.3

2009

6.4

1997

6.3

1994

6.8

2010

7.2

1975

8.2

2020

7.9

2013

7.0

1998

8.2

1989

5.9