2004

7.0

2005

7.8

1988

7.5

2008

7.7

1970

7.2

1950

7.5

2009

6.9

2002

6.7

2005

8.1

1986

7.9

1993

6.0

2016

7.9

1980

6.5

1985

7.7

2013

6.5

1960

8.4

2002

8.0

2014

8.2

1993

7.6

2019

8.1