| Year | Total Expenses | Average Net Price |
|---|---|---|
| 2015 | $19,300 | $10,310 |
| 2016 | $19,750 | $11,844 |
| 2017 | $20,035 | $10,208 |
| 2018 | $20,035 | $10,637 |
| 2019 | $20,946 | $11,481 |
| 2020 | $21,709 | $12,244 |
| 2021* | $22,215 | $13,058 |
| 2022* | $22,732 | $13,927 |
| 2023* | $23,262 | $14,853 |
| 2024* | $23,804 | $15,840 |
| 2025* | $24,359 | $16,894 |
