1996

6.5

2001

1.5

1997

5.4

2015

0.0

2023

0.0

2002

6.5

2013

0.0

1994

7.0

2004

4.5

1971

6.4

1970

6.2

2003

6.7

2004

6.1

2006

4.9

2012

6.0