1994

7.5

1969

5.1

2009

7.2

2011

5.5

2017

7.1

1982

6.8

2016

9.7

1967

7.3

2012

6.0

1996

5.3

1999

7.4

2009

8.5

1972

7.4

1975

7.4

2014

8.5

1970

6.7

2013

6.6

2001

6.0

2014

6.3

2020

8.3