1962

6.9

1991

7.0

2001

7.5

2000

6.7

2004

6.4

1953

4.8

1968

6.9

2019

8.4

2013

6.1

2020

6.7

2019

6.7

1986

5.8

2004

6.6

2016

6.0

1980

5.9

1987

5.2

2008

5.8

1995

7.8

2006

6.1

2014

7.0