1964

7.4

2021

7.4

2021

7.2

1970

6.4

2011

5.8

2013

7.6

1969

7.1

1987

5.7

1952

7.0

2009

6.6

1985

6.1

2009

6.2

1985

6.2

2012

6.5

1989

6.2

1980

7.2

2005

7.5

2006

6.4

1998

4.8

2009

7.1