2016

4.7

2008

5.9

1982

6.9

1987

6.3

2006

4.6

1962

6.0

1999

7.1

2006

4.8

1990

6.2

2014

7.9

1972

6.5

2021

4.8

1967

5.2

1989

6.2

1987

5.7

1993

7.4

2008

5.2

1952

6.5

2007

7.0

2017

3.0