1986

5.0

2020

4.8

2013

6.7

2017

6.8

1993

5.5

2009

5.8

2019

7.3

1999

7.5

2005

5.9

2002

5.0

2003

2.9

2013

4.3

2012

6.1

2012

5.8

2014

6.3

2007

6.5

1982

5.2

1999

3.4

1975

5.3

1972

3.2