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Table 1: 
Estimated sample sizes for 80% or 90% power at the 2-sided 5% significance level to detect specific yearly rates of WBNAA change using K equally spaced annual scans
Yearly WBNAA Rate of Change (%) 80% Power 90% Power
K = 4 K = 6 K = 4 K = 6
2 207 104 276 139
4 54 28 71 37
6 25 14 33 18
8 15 9 20 11
10 11 7 14 8
Yearly WBNAA Rate of Change (%)	80% Power		90% Power
Yearly WBNAA Rate of Change (%)	K = 4	K = 6	K = 4	K = 6
2	207	104	276	139
4	54	28	71	37
6	25	14	33	18
8	15	9	20	11
10	11	7	14	8