1968

6.4

2010

6.3

1969

8.3

2021

5.3

2019

7.7

2001

5.9

1993

5.5

2013

6.1

2002

5.5

2001

6.7

2007

10.0

1970

7.7

1994

6.5

1959

5.8

2009

6.5

2014

4.5

2017

4.7

2020

4.7

2001

7.2