2004

5.6

1987

7.3

1996

6.6

2002

7.1

2005

6.3

2001

6.7

2015

4.9

2001

7.4

1991

5.9

1989

7.0

1995

6.4

2003

6.5

1990

6.8

2005

6.0

2001

7.3

1984

5.9

1997

6.8

2005

6.7

2005

6.8

2004

6.7