| Year | Total Expenses | Average Net Price |
|---|---|---|
| 2015 | $18,361 | $12,498 |
| 2016 | $20,179 | $14,643 |
| 2017 | $21,830 | $16,229 |
| 2018 | $21,830 | $15,230 |
| 2019 | $22,594 | $16,292 |
| 2020 | $22,594 | $16,292 |
| 2021* | $23,385 | $17,428 |
| 2022* | $24,203 | $18,642 |
| 2023* | $25,050 | $19,942 |
| 2024* | $25,927 | $21,332 |
| 2025* | $26,835 | $22,818 |