1990

0.0

1987

4.2

2006

3.5

2013

6.3

1986

0.0

2021

6.1

1994

7.0

2005

0.0

1984

0.0

2011

6.9

1971

6.4

2006

6.0

2016

5.9

1979

4.5

1993

1.0

2015

6.4