| Reference Material | All | Male | Female | USA | Europe | 10-18 | 19-25 | 26-50 | 50+ | Novice | Intermediate | Expert |
| A few times | 693.00 9.60% |
439.00 9.72% |
248.00 9.50% |
588.00 9.81% |
36.00 7.38% |
51.00 14.13% |
118.00 9.32% |
389.00 9.30% |
106.00 9.80% |
336.00 14.20% |
247.00 9.10% |
104.00 5.08% |
| Don't know | 52.00 0.72% |
39.00 0.86% |
12.00 0.46% |
42.00 0.70% |
4.00 0.82% |
0.00 0.00% |
11.00 0.87% |
33.00 0.79% |
5.00 0.46% |
31.00 1.31% |
16.00 0.59% |
4.00 0.20% |
| Never | 109.00 1.51% |
59.00 1.31% |
48.00 1.84% |
91.00 1.52% |
5.00 1.02% |
4.00 1.11% |
19.00 1.50% |
56.00 1.34% |
23.00 2.13% |
78.00 3.30% |
19.00 0.70% |
10.00 0.49% |
| Once per day | 531.00 7.36% |
338.00 7.48% |
188.00 7.20% |
433.00 7.22% |
39.00 7.99% |
19.00 5.26% |
101.00 7.98% |
309.00 7.39% |
73.00 6.75% |
153.00 6.46% |
214.00 7.89% |
159.00 7.77% |
| Once per month | 229.00 3.17% |
137.00 3.03% |
90.00 3.45% |
199.00 3.32% |
12.00 2.46% |
27.00 7.48% |
56.00 4.42% |
126.00 3.01% |
14.00 1.29% |
66.00 2.79% |
100.00 3.68% |
61.00 2.98% |
| Once per week | 445.00 6.16% |
280.00 6.20% |
157.00 6.02% |
360.00 6.01% |
34.00 6.97% |
44.00 12.19% |
105.00 8.29% |
234.00 5.60% |
44.00 4.07% |
143.00 6.04% |
168.00 6.19% |
126.00 6.16% |
| Several | 1.00 0.01% |
0.00 0.00% |
1.00 0.04% |
0.00 0.00% |
0.00 0.00% |
0.00 0.00% |
0.00 0.00% |
0.00 0.00% |
0.00 0.00% |
1.00 0.04% |
0.00 0.00% |
0.00 0.00% |
| Several times per day | 1509.00 20.90% |
964.00 21.34% |
533.00 20.42% |
1243.00 20.73% |
118.00 24.18% |
40.00 11.08% |
228.00 18.01% |
942.00 22.53% |
229.00 21.16% |
379.00 16.01% |
522.00 19.23% |
596.00 29.13% |
| Several times per month | 1180.00 16.35% |
714.00 15.81% |
450.00 17.24% |
999.00 16.66% |
58.00 11.89% |
68.00 18.84% |
228.00 18.01% |
673.00 16.10% |
166.00 15.34% |
365.00 15.42% |
499.00 18.39% |
300.00 14.66% |
| Several times per week | 2470.00 34.22% |
1547.00 34.25% |
883.00 33.83% |
2040.00 34.03% |
182.00 37.30% |
108.00 29.92% |
400.00 31.60% |
1419.00 33.94% |
422.00 39.00% |
815.00 34.43% |
929.00 34.23% |
686.00 33.53% |
GVU's WWW Surveying Team
Graphics, Visualization, & Usability Center
College of Computing
Georgia Institute of Technology
Atlanta, GA 30332-0280