Table:
| Consolidated |  |  |  |
| --- | --- | --- | --- |
|  | 2019 | 2018 | Change |
| Product Sales | US$’000 | US$’000 | % |
| Altium Designer licenses | 65,157 | 53,088 | 23% |
| Altium Designer subscriptions | 58,959 | 53,701 | 10% |
| Octopart search advertising | 17,940 | 11,968 | 50% |
| TASKING licenses | 13,536 | 10,432 | 30% |
| TASKING maintenance | 8,324 | 4,706 | 67% |
| Altium Nexus | 6,277 | 3,769 | 67% |
| Service sales | 3,337 | 4,624 | (28%) |
| Other | 3,656 | 2,254 | 62% |
| Total Product Sales | 177,216 | 144,541 | 23% |
Paragraphs:
Operational Highlights
Altium achieved US$177.2 million in sales (a 23% increase) and US$171.8 million in product revenue (a 23% increase).
The Board and Systems business revenue grew to US$126.8 million with all regions reporting positive results. EMEA grew revenue to US$44.6 million, an increase of 15% and continued the transformation of its business model to direct transactional sales in key markets. The America’s achieved revenue of US$50.9 million which was a 14% growth rate. China results were outstanding with revenue at US$19.8 million, a growth rate of 37%. The Altium focus on our business in China led us to open a new sales office in Beijing and to expand our existing sales centres in Shenzhen and Shanghai. The expansion of our footprint in China will enable us to increase our penetration of the market.
Question:
Which product sales segment had the smallest percentage change from 2018 to 2019?