2007

7.4

1987

6.6

2006

6.8

2010

7.7

2000

6.9

2021

7.3

1997

7.1

2013

7.6

1998

6.9

2000

7.5

2020

7.7

2019

8.1

2015

7.8

2018

7.5

1964

8.0

1984

7.0

2014

7.4

1965

7.4

2012

6.3

2013

8.0