Table 4. Index of completeness.

Completeness	Index
100%	1.0
90–99%	0.9
80–89%	0.8
70–79%	0.7
60–69%	0.6
50–59%	0.5
40–49%	0.4
30–39%	0.3
20–29%	0.2
10–19%	0.1
1–10%	0.05
<1%	0