| Year | Total Expenses | Average Net Price |
|---|---|---|
| 2015 | $31,000 | $16,875 |
| 2016 | $31,960 | $17,435 |
| 2017 | $33,274 | $17,704 |
| 2018 | $33,274 | $16,927 |
| 2019 | $35,220 | $17,954 |
| 2020 | $35,882 | $18,616 |
| 2021* | $36,994 | $19,234 |
| 2022* | $38,141 | $19,873 |
| 2023* | $39,324 | $20,532 |
| 2024* | $40,543 | $21,214 |
| 2025* | $41,799 | $21,918 |