1955

2.0

1981

5.3

1959

4.9

1989

7.7

2018

5.7

1980

6.5

1972

7.8

1979

6.2

1990

4.4

2002

5.9

2000

6.0

1989

0.0

2017

6.9

2005

6.6

2002

3.5

2001

6.6

2008

4.8

1986

5.9

1977

6.7

1983

7.1