2001

7.8

2005

6.2

2002

6.3

2008

6.8

1992

5.0

2023

10.0

2012

7.0

1998

5.8

1991

5.8

2010

7.5

2016

7.9

1964

6.4

1989

6.0

2004

3.8

1977

4.1

1984

6.0

2016

5.3

2011

5.3

2009

6.0

2017

6.7