2015

7.4

1986

8.3

2003

7.4

2002

7.4

2007

7.9

2005

7.0

1969

7.8

1997

7.1

1996

7.7

2018

8.1

2020

8.1

1981

7.4

2016

7.8

2018

8.3

2010

8.0

1983

7.3

2000

8.2

1985

7.8

2015

7.6

1992

8.5