2011

5.5

1988

5.3

2000

7.2

1987

7.5

2016

5.8

2018

7.5

1982

6.2

2008

6.5

2007

4.9

2004

7.1

1966

6.4

2001

6.4

1986

6.6

2014

5.6

2007

6.7

2007

6.7

2001

6.1

1983

6.7

2012

4.5

1996

6.7