AdZone released its estimates of the global online advertising industry.
| Month | Estimated Expenditures |
Impressions |
| Jan-04 | $826,115,500 | 76,769,710,000 |
| Feb-04 | $664,427,600 | 59,887,610,000 |
| Mar-04 | $687,473,200 | 66,874,720,000 |
| Apr-04 | $745,984,000 | 71,373,600,000 |
| May-04 | $652,480,800 | 58,391,660,000 |
| Jun-04 | $690,350,900 | 64,956,190,000 |
| Jul-04 | $684,615,000 | 64,069,030,000 |
| Aug-04 | $611,146,300 | 52,334,900,000 |
| Sep-04 | $696,169,600 | 61,516,340,000 |
| Source: AdZone | ||