2017

7.4

1961

7.7

1976

7.8

1979

7.3

1982

6.9

1985

7.1

1990

5.8

1980

7.9

1996

5.7

2003

6.5

2007

5.6

2014

5.6

2005

7.6

1984

5.0

2021

6.4

2017

0.0

1998

7.2

2006

6.6

2017

5.3

1976

5.7