| Year | Total Expenses | Average Net Price |
|---|---|---|
| 2015 | $36,611 | $20,489 |
| 2016 | $37,395 | $27,020 |
| 2017 | $38,027 | $20,165 |
| 2018 | $38,027 | $19,015 |
| 2019 | $39,974 | $15,252 |
| 2020 | $40,843 | $16,121 |
| 2021* | $41,717 | $15,202 |
| 2022* | $42,610 | $14,336 |
| 2023* | $43,522 | $13,518 |
| 2024* | $44,453 | $12,748 |
| 2025* | $45,404 | $12,021 |