1993

7.4

2004

7.9

1973

7.5

2021

6.2

1994

6.6

1976

7.8

1986

6.4

2015

7.8

2016

6.7

2015

6.7

2009

6.6

2002

6.0

2011

8.0

2004

4.7

2002

7.0

2008

7.8

2006

6.9

1997

6.1

1992

7.3

2013

6.1