| Year | Total Expenses | Average Net Price |
|---|---|---|
| 2015 | $24,320 | $18,526 |
| 2016 | $17,000 | $13,720 |
| 2017 | $17,300 | $11,120 |
| 2018 | $17,300 | $7,917 |
| 2019 | $18,000 | $9,216 |
| 2020 | $18,500 | $9,716 |
| 2021* | $18,826 | $7,875 |
| 2022* | $19,157 | $6,383 |
| 2023* | $19,494 | $5,173 |
| 2024* | $19,837 | $4,193 |
| 2025* | $20,186 | $3,398 |
