1993

6.6

1991

7.0

2019

6.6

2000

6.6

2018

6.1

1954

6.7

2000

7.3

1966

6.2

2007

6.1

2003

6.1

1965

7.6

2008

8.7

2016

6.2

2013

5.3

1997

6.9

1966

6.2

1968

6.9

2010

6.8

1987

7.4

1990

6.0