| Year | Total Expenses | Average Net Price |
|---|---|---|
| 2015 | $19,274 | $12,498 |
| 2016 | $19,943 | $12,427 |
| 2017 | $19,547 | $12,672 |
| 2018 | $19,547 | $12,755 |
| 2019 | $21,247 | $13,764 |
| 2020 | $22,017 | $14,534 |
| 2021* | $22,781 | $14,820 |
| 2022* | $23,571 | $15,112 |
| 2023* | $24,389 | $15,410 |
| 2024* | $25,236 | $15,714 |
| 2025* | $26,111 | $16,023 |