2014

4.5

2003

5.8

2021

6.2

2004

6.7

2014

7.2

1990

4.4

2007

6.9

2010

7.1

1989

5.8

2009

7.0

2012

6.3

2000

7.0

2003

7.5

1993

5.4

2011

7.0

5.7

1976

5.9