Table:
|  | December 31, |  |
| --- | --- | --- |
|  | 2019 | 2018 |
| Operating accruals | $23,695 | $24,020 |
| Deferred revenue—current portion | 4,316 | 4,504 |
| Payroll and benefits | 6,613 | 7,695 |
| Taxes—non-income based | 6,053 | 4,212 |
| Interest | 10,624 | 11,000 |
| Total | $51,301 | $51,431 |
Paragraphs:
3. Accrued and other liabilities:
Accrued and other current liabilities consist of the following (in thousands):
Question:
What are the respective current portion of deferred revenue in 2018 and 2019?