2019

6.8

2009

5.2

2000

6.2

2016

6.5

2003

6.9

1987

7.0

1988

7.0

1984

7.0

2008

8.4

1998

6.4

2002

6.7

2017

7.0

2020

8.0

2012

7.0

1994

6.7

1995

7.0

1986

6.8

1994

6.2

1976

7.3

1968

6.9