| Year | Total Expenses | Average Net Price |
|---|---|---|
| 2015 | $24,810 | $15,908 |
| 2016 | $25,750 | $16,484 |
| 2017 | $25,824 | $15,558 |
| 2018 | $25,824 | $16,173 |
| 2019 | $27,904 | $13,773 |
| 2020 | $28,484 | $14,353 |
| 2021* | $29,076 | $14,873 |
| 2022* | $29,681 | $15,411 |
| 2023* | $30,299 | $15,969 |
| 2024* | $30,929 | $16,547 |
| 2025* | $31,572 | $17,146 |