6.6

1999

4.6

1988

7.0

2015

4.6

1988

6.3

2019

6.6

2021

6.2

2007

5.4

2017

6.9

1993

5.5

1966

6.5

1989

5.8

2006

6.1

1965

6.7

2011

6.8

2006

6.8

2017

4.7

2001

5.2

1982

6.7

1982

6.0