1953

7.2

1966

6.1

2009

6.8

1987

6.3

2013

6.5

1999

5.9

1986

6.2

1988

6.4

2010

7.4

2001

7.2

2014

6.3

1955

7.2

1975

6.3

2022

6.1

5.7

2011

7.0

1991

5.3

2003

6.0

2014

7.6

2017

7.3