1992

7.5

1980

6.8

1980

0.0

2000

7.9

2005

7.5

2005

6.4

2014

8.0

2016

4.0

1992

6.9

1976

0.0

2006

7.4

2015

0.0

2009

6.8

1977

7.5

1992

6.0

1984

6.7

1988

5.2

2013

6.0

1975

7.7

1995

6.6

1990

7.2