1996

7.7

2013

8.7

2019

8.2

2020

7.5

2015

8.2

1986

8.3

2007

8.5

1973

8.0

1996

8.0

2002

7.4

2005

7.6

2017

7.5

1998

7.5

2001

8.4

2012

8.2

2015

8.3

2015

8.7

1998

7.5

1989

8.3

2001

7.6