2020

6.9

1989

6.2

2011

7.1

2016

7.4

1957

7.2

1972

6.2

1999

8.0

1978

6.6

1990

6.5

2016

5.3

2012

7.8

2007

5.6

1972

7.7

2017

5.7

1991

6.3

2017

7.2

2007

6.9

1996

7.6

2013

8.1

1964

7.3