Table:
| (In thousands) | 2019 | 2018 | 2017 |
| --- | --- | --- | --- |
| United States | $300,853 | $288,843 | $508,178 |
| Mexico | 90,795 | 12,186 | 2,246 |
| Germany | 78,062 | 167,251 | 119,502 |
| Other international | 60,351 | 60,997 | 36,974 |
| Total | $530,061 | $529,277 | $666,900 |
Paragraphs:
Additional Information
The following table presents sales information by geographic area for the years ended December 31, 2019, 2018 and 2017:
Customers comprising more than 10% of revenue can change from year to year. Single customers comprising more than 10% of our revenue in 2019 included three customers at 19%, 17% and 13%. Single customers comprising more than 10% of our revenue in 2018 included two customers at 27% and 17%. Single customers comprising more than 10% of our revenue in 2017 included two customers at 40% and 16%. Other than those with more than 10% of revenues disclosed above, and excluding distributors, our next five largest customers can change, and has historically changed, from year-to-year. These combined customers represented 15%, 18% and 15% of total revenue in 2019, 2018 and 2017, respectively.
As of December 31, 2019, property, plant and equipment, net totaled $73.7 million, which included $69.9 million held in the U.S. and $3.9 million held outside the U.S. As of December 31, 2018, property, plant and equipment, net totaled $80.6 million, which included $77.3 million held in the U.S. and $3.3 million held outside the U.S. Property, plant and equipment, net is reported on a company-wide, functional basis only.
Question:
What years does the table include data for?
Answer: 2019, 2018, 2017