| Year | Total Expenses | Average Net Price |
|---|---|---|
| 2015 | $27,152 | $17,477 |
| 2016 | $28,556 | $18,337 |
| 2017 | $17,500 | $7,582 |
| 2018 | $28,872 | $19,304 |
| 2019 | $30,492 | $19,298 |
| 2020 | $30,860 | $19,666 |
| 2021* | $32,455 | $20,042 |
| 2022* | $34,133 | $20,424 |
| 2023* | $35,898 | $20,815 |
| 2024* | $37,754 | $21,212 |
| 2025* | $39,706 | $21,617 |