1985

4.3

2015

8.1

2001

5.8

1959

6.1

2016

6.1

2009

7.3

2003

5.3

1984

7.1

2001

8.9

1969

7.6

2000

7.4

2014

7.1

2007

7.5

2023

6.4

2016

9.7

1978

5.9

2017

5.5

1993

6.3

2011

7.1

2000

7.1