1985

0.0

1994

5.3

1981

6.7

2012

7.0

1986

6.1

2013

5.9

2012

6.4

1999

5.8

1976

6.0

2014

5.5

1993

6.1

1990

6.1

1985

0.0

1990

0.0

1985

0.0