Revenue from Asia Pacific decreased to 51%, while contribution from North American customers increased to 38%. Revenue from Japan remained at 3%.
| Revenue Breakdown by Region | |||||||||||
| Region | 4Q18 | 3Q18 | 2Q18 | 1Q18 | 4Q17 | ||||||
| North America | 38% | 34% | 37% | 42% | 43% | ||||||
| Asia Pacific | 51% | 52% | 51% | 47% | 45% | ||||||
| Europe | 8% | 11% | 9% | 8% | 9% | ||||||
| Japan | 3% | 3% | 3% | 3% | 3% | ||||||
