1985

6.7

1994

8.3

1988

6.2

1998

6.7

2002

6.3

1984

7.2

2002

8.0

2016

0.0

2019

5.7

2004

6.5

2003

6.6

2005

6.8

2019

10.0

2000

7.9

1984

4.3

2010

1.0

2007

6.8

1961

7.2

1952

6.8

2008

7.0