1996

5.5

1966

7.1

1997

6.1

1994

3.6

2005

5.8

2008

6.9

2006

6.2

1949

6.9

1996

0.0

2002

5.3

1968

4.9

1965

6.8

1967

6.7

1970

7.6

1997

6.6

1970

6.2

1984

6.9

1986

6.6

1989

6.1

2003

6.0