2004

7.2

2002

7.3

1994

7.0

2014

6.4

1998

6.8

2015

6.5

2008

7.6

2000

8.0

2001

7.4

2003

6.5

1995

6.9

1976

8.0

2019

7.0

2009

5.9

1966

7.6

1975

6.3

1994

8.2

2013

7.5

2011

6.1

2000

6.9