2009

7.0

2006

6.6

5.6

1996

8.0

1995

7.3

2002

8.4

2003

6.2

5.4

2004

6.0

2015

5.8

2011

7.3

2019

8.7

2012

6.4

1967

6.6

1968

6.9

1988

5.7

1993

6.1

2013

5.6

2005

5.5

2017

5.9