1975

4.5

1999

2.0

2019

6.8

1991

5.6

1.0

1988

7.4

1987

6.4

0.0

2023

0.0

2014

0.0

2018

4.4

2011

0.0

1997

7.6

2013

10.0

0.0

2009

0.0

2009

0.0

2006

2.0

2000

3.7

1967

0.0