1992

7.2

1998

6.8

1988

6.7

1998

6.0

1989

6.9

2015

5.0

1994

5.2

1996

5.5

1991

4.9

1995

7.3

1996

6.0

1992

4.8

2015

7.5

1984

7.3

1990

7.5

2001

5.9

1999

6.1

2011

7.0

1990

4.8

2003

7.2

1994

4.3

1997

3.0

2001

7.0