2007

7.3

2017

7.6

1993

7.0

2016

5.9

1968

6.6

1971

7.2

1988

7.6

2007

7.5

2013

7.2

2001

6.9

1975

7.2

1986

6.8

1992

7.0

1953

7.4

2006

6.1

2021

6.6

2017

6.4

1928

7.3

2004

5.9

2006

6.2