1988

6.3

2017

6.7

2005

4.0

2016

3.3

1996

6.4

1970

7.2

1964

7.1

2002

6.8

2003

5.9

2005

5.3

1970

0.0

2013

8.5

2001

7.3

2020

0.0

1972

5.5

1991

5.6

1992

4.9

2023

0.0

2017

6.9

2003

5.4