1989

6.1

1998

6.9

1986

5.0

1990

7.4

2001

7.6

1999

7.9

2014

7.0

1998

6.4

2005

0.0

2006

5.8

1989

4.0

1969

5.7

1988

5.0

2002

7.3

2004

7.0

2005

5.7

1986

6.4

2003

7.3

1993

5.0