2006

7.1

2015

6.0

2000

7.6

2018

5.5

2004

7.9

2000

7.9

1993

6.0

1987

6.0

2002

6.9

1997

6.7

2005

7.5

1992

5.9

2003

7.2

1996

7.8

1986

7.9

1995

7.6

2000

7.1

1996

5.7

2006

6.7

1998

4.0

1999

7.1

1999

8.3

1989

5.3

2011

8.0