1992

6.3

2018

6.7

2013

6.1

1994

4.2

2021

9.2

2003

6.0

1964

7.4

1994

6.2

1952

5.9

1991

7.4

1981

7.3

2020

6.9

2015

6.0

1985

6.4

1974

6.1

2005

5.4

2011

7.1

1972

4.0

2010

6.5

1996

5.4