2016

6.1

2019

6.5

1999

8.0

2004

6.4

1975

6.9

2013

6.7

2020

6.3

2003

5.3

2010

7.0

2009

5.9

2000

5.1

2005

5.2

1966

6.3

1965

6.8

1984

7.2

1989

6.2

2004

5.5

2009

6.1

1988

6.5

1966

6.1