1999

6.6

2003

5.9

2019

5.9

2007

5.4

2019

7.0

1997

6.5

1993

5.5

1974

5.8

1999

7.0

1966

6.5

2015

6.4

1947

7.7

2006

6.4

2005

5.2

2016

7.2

1959

6.1

1982

5.9

1948

7.0

1975

6.4

2017

6.6