| Year | Total Expenses | Average Net Price |
|---|---|---|
| 2015 | $19,510 | $14,523 |
| 2016 | $21,285 | $18,617 |
| 2017 | $22,228 | N/A |
| 2018 | $22,228 | $16,413 |
| 2019 | $23,749 | $17,601 |
| 2020 | $21,823 | $15,675 |
| 2021* | $22,790 | $16,810 |
| 2022* | $23,799 | $18,027 |
| 2023* | $24,854 | $19,332 |
| 2024* | $25,955 | $20,732 |
| 2025* | $27,104 | $22,233 |