1960

6.9

2006

5.1

1946

6.6

1995

7.6

1998

6.8

1961

6.5

2010

6.4

1998

7.4

1967

7.6

1990

7.4

2007

6.9

2008

6.6

2003

5.3

2016

7.3

2017

7.8

1992

7.4

2003

6.0

2009

7.2

1990

5.6

1999

7.9