1991

5.3

2015

6.0

2012

6.4

2016

4.5

2013

6.1

2001

8.9

2017

9.0

1992

6.9

2005

9.9

2019

6.3

2004

7.1

1966

6.5

2002

7.4

2021

6.3

1994

6.8

5.4

2014

4.6

1984

7.1

1926

5.6

2007

5.7