1973

7.2

1949

6.2

2010

9.1

1989

5.4

2015

6.4

2021

7.9

1994

5.4

2012

6.0

2008

5.6

1996

9.5

2004

5.9

2007

9.8

2013

6.5

2008

7.8

1990

7.5

2010

6.2

2014

7.1

2010

6.3

1971

6.8