1989

8.0

1983

6.0

1989

5.9

2013

5.6

1995

6.3

2004

7.2

1998

5.5

2002

7.7

2009

2.8

2017

6.5

1988

4.5

2002

6.9

2001

7.4

1962

7.7

2016

6.6

1952

6.7

2001

7.8

1991

7.0

2003

7.2

2019

5.0