1994

4.6

6.4

2010

7.9

2015

6.3

2014

6.9

6.3

1975

6.9

1993

6.5

2013

7.8

1972

6.6

2023

6.3

2009

8.5

1968

6.0

2019

6.7

2021

6.0

1966

6.2

1985

6.8

2012

5.2

1998

6.0

2012

9.7