Table:
|  |  | Year ended December 31 |  |  |
| --- | --- | --- | --- | --- |
| (EUR million) | 2018 |  | 2019 |  |
| United States | 175.9 | 21.5% | 339.5 | 26.4% |
| Europe | 165.6 | 20.2% | 126.2 | 9.8% |
| Asia | 476.6 | 58.3% | 818.2 | 63.7% |
|  | 818.1 | 100.0% | 1,283.9 | 100.0% |
Paragraphs:
REVENUE
The sales cycle from quotation to shipment for our Front-end equipment generally takes several months, depending on capacity utilization and the urgency of the order. Usually, acceptance is within four months after shipment. The sales cycle is longer for equipment that is installed at the customer’s site for evaluation prior to sale. The typical trial period ranges from six months to two years after installation.
Our revenues are concentrated in Asia, the United States and Europe. The following table shows the geographic distribution of our revenue for 2018 and 2019:
Question:
What is the usual acceptance duration after shipment?
Answer: within four months