2019

7.5

1985

6.5

2017

6.1

2011

7.5

2020

6.8

1976

6.7

2014

7.1

1993

6.8

1982

5.7

1985

5.5

1986

6.8

1994

5.7

1952

7.0

1996

5.6

1996

6.4

2003

7.3

2006

4.2

1968

6.9

2002

5.0

1984

6.9