| Year | Total Expenses | Average Net Price |
|---|---|---|
| 2015 | $16,850 | $4,671 |
| 2016 | $18,700 | $6,102 |
| 2017 | $19,200 | $8,365 |
| 2018 | $19,200 | $6,876 |
| 2019 | $20,000 | $6,637 |
| 2020 | $18,600 | $5,237 |
| 2021* | $19,097 | $5,055 |
| 2022* | $19,606 | $4,879 |
| 2023* | $20,130 | $4,709 |
| 2024* | $20,667 | $4,545 |
| 2025* | $21,219 | $4,387 |