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# The average number,in lakhs,of working days lost in strikes during each year of the period 1981-90 was :

 1981 1982 1983 1984 1985 1986 1987 1988 1989 1990 1.5 1.8 1.9 2.2 2.6 3.7 2.2 6.4 3.6 5.4

Calculate the three-yearly moving averages and draw the moving averages graph.

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