2011

7.5

1994

8.7

1971

8.2

1997

7.9

2019

8.5

1996

7.9

1975

8.4

2000

7.1

2008

8.5

1985

8.3

2017

7.6

2011

7.1

2007

7.2

1972

8.7

1999

8.4

2013

7.5

2009

7.3

2013

7.3

1992

6.8

2012

7.4