2002

7.6

2005

7.5

1995

8.0

2004

7.8

2006

6.1

1987

7.3

2002

6.9

1994

7.9

2000

6.3

1990

7.5

2005

7.4

1993

7.6

1999

7.0

2005

7.8

1987

7.8

1996

7.5

2000

7.4

2005

6.9

2016

3.6

2016

6.2