2004

5.3

1991

4.7

2006

6.2

1970

3.8

2012

6.0

1991

5.9

2007

6.4

2006

6.3

2001

7.4

1973

3.7

1996

7.0

2017

6.7

2013

0.0

1966

2.5

2002

6.4

2003

6.6

2018

2.3

1977

4.7

1975

7.5

2010

5.1