1989

6.6

2016

7.1

1990

5.8

1988

5.8

2008

8.1

1990

7.4

2001

7.6

1995

5.1

2014

7.5

2018

8.4

1992

0.0

2018

7.0

1993

4.8

1989

6.7

1984

7.0

1985

7.1

2009

8.3