1976

5.6

2013

0.0

2002

5.3

1992

5.0

2008

6.8

2002

6.4

1989

6.0

2004

3.8

1989

9.0

2018

5.8

1998

5.8

2011

5.1

1996

7.7

1991

5.8

1977

4.1

2015

4.6

2009

6.0

1998

4.2

2017

6.7