| Year | Total Expenses | Average Net Price |
|---|---|---|
| 2015 | $28,561 | $20,493 |
| 2016 | $28,937 | $21,048 |
| 2017 | $29,261 | $21,296 |
| 2018 | $29,261 | $21,172 |
| 2019 | $30,678 | $22,497 |
| 2020 | $30,198 | $22,017 |
| 2021* | $30,536 | $22,277 |
| 2022* | $30,878 | $22,540 |
| 2023* | $31,224 | $22,806 |
| 2024* | $31,574 | $23,075 |
| 2025* | $31,927 | $23,347 |