2018

6.7

1969

7.6

2017

5.5

2009

6.6

1977

6.3

2010

7.7

1988

6.4

1993

6.6

1987

5.5

1959

6.1

2014

9.7

1984

6.6

2010

7.2

2004

7.3

1999

5.1

2000

7.4

1993

6.3

1980

6.4

2015

7.1

1985

5.8