1985

2.1

1985

6.5

1981

8.0

2001

7.3

2007

6.6

2016

7.4

2020

8.1

2010

7.1

2010

7.4

2015

7.7

1987

0.0

1999

4.8

1982

7.2

2002

5.9

2005

6.3

1966

7.4

1994

9.0

1980

6.0

2015

7.8

2015

10.0