| Value | Category |
|---|---|
| -9 | do not know |
| -7 | not in business at the end of 2006 |
| 0 | |
| 2 | |
| 3 | |
| 4 | |
| 5 | |
| 6 | |
| 7 | |
| 8 | |
| 9 | |
| 10 | |
| 11 | |
| 12 | |
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| 19 | |
| 20 | |
| 21 | |
| 22 | |
| 23 | |
| 24 | |
| 25 | |
| 27 | |
| 28 | |
| 30 | |
| 31 | |
| 32 | |
| 33 | |
| 34 | |
| 35 | |
| 37 | |
| 38 | |
| 40 | |
| 44 | |
| 45 | |
| 47 | |
| 48 | |
| 49 | |
| 50 | |
| 52 | |
| 53 | |
| 54 | |
| 55 | |
| 56 | |
| 58 | |
| 59 | |
| 60 | |
| 65 | |
| 67 | |
| 68 | |
| 69 | |
| 70 | |
| 72 | |
| 73 | |
| 74 | |
| 75 | |
| 78 | |
| 79 | |
| 80 | |
| 81 | |
| 82 | |
| 84 | |
| 85 | |
| 89 | |
| 90 | |
| 91 | |
| 92 | |
| 93 | |
| 94 | |
| 95 | |
| 96 | |
| 97 | |
| 98 | |
| 100 | |
| 102 | |
| 108 | |
| 109 | |
| 110 | |
| 112 | |
| 114 | |
| 115 | |
| 116 | |
| 120 | |
| 122 | |
| 126 | |
| 127 | |
| 130 | |
| 134 | |
| 135 | |
| 140 | |
| 145 | |
| 149 | |
| 150 | |
| 152 | |
| 155 | |
| 160 | |
| 167 | |
| 170 | |
| 171 | |
| 180 | |
| 182 | |
| 186 | |
| 189 | |
| 190 | |
| 195 | |
| 200 | |
| 210 | |
| 220 | |
| 225 | |
| 230 | |
| 244 | |
| 250 | |
| 252 | |
| 262 | |
| 270 | |
| 300 | |
| 310 | |
| 350 | |
| 360 | |
| 370 | |
| 380 | |
| 387 | |
| 390 | |
| 400 | |
| 421 | |
| 450 | |
| 470 | |
| 477 | |
| 486 | |
| 490 | |
| 500 | |
| 530 | |
| 600 | |
| 700 | |
| 750 | |
| 770 | |
| 1110 | |
| 1229 | |
| 1250 | |
| 1300 | |
| 1800 | |
| 2500 | |
| 3000 | |
| 3800 |