1985

7.1

1997

6.7

2018

7.0

2005

2.9

1996

7.2

1979

5.3

1998

2.3

1983

2.0

2013

4.9

2012

3.0

2002

1.0

2006

6.5

2018

7.5

1969

5.6

2003

4.1

1972

2.8

2013

1.0

2005

7.2

2004

5.4

2018

8.6