2003

7.4

2002

6.6

1989

8.3

1955

7.5

1999

7.4

1983

7.2

1979

7.0

1986

7.9

2016

6.0

2017

5.9

1993

0.0

2002

6.3

1988

5.0

2001

6.8

1962

7.7

2003

7.2

1997

6.7

2004

6.3

1990

1.0

2013

4.0