1948

6.7

1981

6.6

1993

5.7

2014

5.7

1984

7.2

1977

7.1

2006

5.5

2017

5.5

2021

7.3

1994

6.4

2005

6.4

2017

7.0

2008

5.4

1974

7.0

1996

5.5

2019

7.0

1969

6.9

1988

6.7

2004

5.8

1981

6.4