1998

4.8

2007

2.0

2005

5.8

1991

6.0

1996

7.2

2006

5.0

1991

0.0

1994

5.4

2002

6.7

2013

7.6

1986

4.9

2015

5.8

1994

4.1

1992

0.0

1996

7.0

2003

5.3

1986

5.8

1992

7.0

1999

7.1

1996

6.0

1989

6.0

1989

4.5

2012

6.4

1995

7.8

2005

4.8

2011

5.5

1998

6.3

2005

6.2