| Variable | Full sample | Participants | Nonparticipants | Freq. | (%) | Freq. | (%) | Freq. | (%) |
| Up to 2,500 | 114 | 76.0 | 43 | 67.2 | 71 | 82.5 | 2,501–5,000 | 23 | 15.3 | 13 | 20.3 | 10 | 11.6 | 5,001–7,500 | 2 | 1.3 | 1 | 1.56 | 1 | 1.2 | 7,501–10,000 | 3 | 2.0 | 1 | 1.56 | 2 | 2.3 | 10,001–12,500 | 2 | 1.3 | 2 | 3.12 | 0 | 0 | 12,501–15,000 | 2 | 1.3 | 1 | 1.56 | 1 | 1.2 | 15,001–17,500 | 1 | 0.7 | 0 | 0 | 1 | 1.2 | 17,501–20,000 | 2 | 1.3 | 2 | 3.13 | 0 | 0 | Above 20,000 | 1 | 0.7 | 1 | 1.56 | 0 | 0 | Total | 150 | 100 | 64 | 100 | 86 | 100 |
| Mean | 2,599 | | 4,204 | | 2,511 | | Minimum | 140 | | 480 | | 140 | | Maximum | 21,120 | | 21,120 | | 15,600 | |
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