| Year | Total Expenses | Average Net Price |
|---|---|---|
| 2015 | $23,017 | $15,806 |
| 2016 | $23,354 | $15,496 |
| 2017 | $24,230 | $16,362 |
| 2018 | $24,230 | $16,169 |
| 2019 | $26,230 | $16,782 |
| 2020 | $26,963 | $17,515 |
| 2021* | $27,715 | $18,179 |
| 2022* | $28,489 | $18,868 |
| 2023* | $29,283 | $19,583 |
| 2024* | $30,100 | $20,325 |
| 2025* | $30,940 | $21,095 |