1965

6.8

2010

6.6

1998

6.2

1964

7.0

1992

5.0

2013

8.0

2013

7.3

2015

6.0

2008

5.7

2015

7.0

2018

6.1

1955

7.2

1972

6.4

1994

5.6

1937

7.2

2017

6.8

1967

6.5

2011

6.9

2020

8.4

1982

6.2