| Year | Total Expenses | Average Net Price |
|---|---|---|
| 2015 | $24,325 | $18,306 |
| 2016 | $24,882 | $19,129 |
| 2017 | $25,308 | $18,384 |
| 2018 | $25,308 | $18,174 |
| 2019 | $26,864 | $19,662 |
| 2020 | $27,369 | $20,167 |
| 2021* | $27,884 | $20,685 |
| 2022* | $28,408 | $21,217 |
| 2023* | $28,942 | $21,762 |
| 2024* | $29,486 | $22,321 |
| 2025* | $30,040 | $22,895 |
