Салин В.Н. Неформальная занятость населения России: оценка масштаба и влияния на государственные финансы стран / Салин В.Н., Нарбут В.В. // Финансы: теория и практика / Finance: Theory and Practice. – 2017. – №6. — Свободный доступ из сети Интернет (чтение, печать, копирование). — <URL:http://elib.fa.ru/art2017/bv2373.pdf>.
| Period | Read | Copy | Open | Total | ||
|---|---|---|---|---|---|---|
| Year 2018 | Quarter 1 | 5 | 0 | 73 | 0 | 78 |
| Quarter 2 | 14 | 0 | 50 | 0 | 64 | |
| Quarter 3 | 9 | 0 | 28 | 0 | 37 | |
| Quarter 4 | 21 | 0 | 13 | 0 | 34 | |
| Year 2019 | Quarter 1 | 25 | 0 | 38 | 0 | 63 |
| Quarter 2 | 16 | 0 | 50 | 0 | 66 | |
| Quarter 3 | 26 | 0 | 60 | 0 | 86 | |
| Quarter 4 | 15 | 0 | 57 | 0 | 72 | |
| Year 2020 | Quarter 1 | 16 | 0 | 53 | 0 | 69 |
| Quarter 2 | 20 | 1 | 67 | 0 | 88 | |
| Quarter 3 | 12 | 0 | 29 | 0 | 41 | |
| Quarter 4 | 18 | 0 | 15 | 0 | 33 | |
| Year 2021 | Quarter 1 | 25 | 0 | 10 | 0 | 35 |
| Quarter 2 | 19 | 0 | 11 | 0 | 30 | |
| Quarter 3 | 27 | 0 | 19 | 0 | 46 | |
| Quarter 4 | 31 | 0 | 21 | 0 | 52 | |
| Year 2022 | Quarter 1 | 26 | 0 | 14 | 0 | 40 |
| Quarter 2 | 30 | 0 | 9 | 0 | 39 | |
| Quarter 3 | 29 | 0 | 12 | 0 | 41 | |
| Quarter 4 | 21 | 0 | 32 | 0 | 53 | |
| Year 2023 | Quarter 1 | 27 | 0 | 38 | 0 | 65 |
| Quarter 2 | 19 | 0 | 10 | 0 | 29 | |
| Quarter 3 | 12 | 0 | 19 | 0 | 31 | |
| Quarter 4 | 18 | 0 | 22 | 0 | 40 | |
| Year 2024 | Quarter 1 | 14 | 0 | 31 | 0 | 45 |
| Quarter 2 | 38 | 0 | 61 | 0 | 99 | |
| Quarter 3 | 46 | 0 | 27 | 0 | 73 | |
| Quarter 4 | 27 | 0 | 27 | 0 | 54 | |
| Year 2025 | Quarter 1 | 34 | 0 | 44 | 0 | 78 |
| Quarter 2 | 43 | 0 | 34 | 0 | 77 | |
| Quarter 3 | 51 | 0 | 28 | 0 | 79 | |
| Quarter 4 | 54 | 0 | 48 | 0 | 102 | |
| Year 2026 | Quarter 1 | 47 | 0 | 44 | 0 | 91 |
| Total | 835 | 1 | 1,094 | 0 | 1,930 | |