1968

6.9

1984

7.1

2002

6.6

2006

5.1

2017

4.2

2015

6.9

2014

5.0

1989

9.2

1998

4.8

2015

5.8

1994

7.4

2014

6.2

2020

6.8

1979

7.3

1993

6.1

2016

5.6

2002

5.4

2021

7.3

1984

6.6

1991

7.0