2006

7.5

1991

7.2

1989

6.0

2000

7.4

2013

6.9

2017

6.7

2019

6.0

1984

0.0

1989

0.0

2015

5.3

2018

6.9

2012

5.5

2016

6.2

1976

6.0

1991

6.0

1992

2.0

1998

4.7

1976

5.7

1950

6.7

1955

7.2