2004

8.3

5.8

1993

6.6

2010

6.9

2009

6.1

2012

5.7

1999

7.4

1998

7.2

2006

7.4

2015

5.0

2013

8.0

1966

7.7

1990

7.5

1999

7.3

7.0

1964

7.9

2001

7.3

2004

10.0

2019

5.8