1987

7.1

1989

6.3

1988

0.0

1984

7.5

2007

3.4

1989

5.0

2007

7.6

1977

6.8

2012

6.8

1993

2.7

1993

7.1

2002

5.3

2013

6.5

1994

7.8

1982

7.3

1981

8.0

1988

7.2

1983

5.6

1984

7.4

2016

6.1

1984

6.3

2018

7.0

2011

4.8

2014

6.5

2009

5.8

1986

6.0

2005

2.0

2006

1.0

2003

4.8