1988

6.3

1989

6.4

1974

7.3

1996

0.0

2008

5.1

2009

4.4

1987

0.0

2007

5.0

1994

3.7

1978

7.2

2007

6.0

1990

5.6

2008

4.0

2002

6.3

2017

5.8

1997

7.2

1990

5.0

2005

5.4

2008

4.4

2013

5.6