1967

6.7

2017

9.4

2005

5.9

2013

6.6

2021

6.1

1992

5.8

1973

6.3

1956

7.1

2007

6.3

2004

5.6

1968

7.4

2015

6.7

2001

5.3

1994

5.3

2009

6.2

2008

4.5

6.1

1989

6.3

1990

6.7

2010

6.1