1986

4.6

1954

7.9

1991

7.1

1997

5.8

1999

8.5

1989

6.3

1994

7.4

1974

6.6

2006

6.6

1993

7.9

0.0

2002

7.4

1982

6.2

1990

6.9

1997

6.6

2003

7.2

2004

7.8

2006

6.7

1996

5.5

2005

6.7