1996

7.5

1997

7.3

1999

6.8

1994

6.7

1998

8.2

1982

7.6

1995

2.0

1989

6.7

1993

6.4

2010

7.9

2003

7.0

1987

7.7

2002

8.0

2014

0.0

1997

6.5

1984

7.5

1989

8.0

1991

5.4

1999

5.8

2015

6.8

2004

7.8

1990

4.9

1997

4.7