1990

6.9

1992

6.8

2016

8.6

2001

8.3

2003

8.1

2007

7.9

2014

7.8

2024

7.9

2019

7.3

1975

6.9

2016

7.3

1999

7.0

2013

7.0

2014

7.7

1976

6.6

1998

8.2

2014

7.6

2005

8.3

2000

7.4

2011

8.1