| Year | Total Expenses | Average Net Price |
|---|---|---|
| 2015 | $14,731 | $8,973 |
| 2016 | $15,325 | $9,922 |
| 2017 | $13,332 | $8,173 |
| 2018 | $13,332 | $7,815 |
| 2019 | $14,406 | $9,179 |
| 2020 | $17,120 | $11,893 |
| 2021* | $17,810 | $13,151 |
| 2022* | $18,528 | $14,543 |
| 2023* | $19,274 | $16,081 |
| 2024* | $20,051 | $17,783 |
| 2025* | $20,859 | $19,664 |