1985

6.2

1979

8.3

1999

7.6

2004

7.4

1986

7.6

1999

6.8

2002

7.0

2020

0.0

2003

5.8

1966

7.3

1955

7.2

1996

6.6

1998

6.7

1971

6.8

1989

7.1

2000

6.0

2005

6.0

1993

6.2

1995

8.0

1988

0.0