| Year | Total Expenses | Average Net Price |
|---|---|---|
| 2015 | $34,050 | $27,710 |
| 2016 | $34,569 | $28,153 |
| 2017 | $35,115 | $28,832 |
| 2018 | $35,115 | $29,485 |
| 2019 | $33,114 | $26,119 |
| 2020 | $41,512 | $34,517 |
| 2021* | $42,143 | $35,297 |
| 2022* | $42,784 | $36,095 |
| 2023* | $43,434 | $36,911 |
| 2024* | $44,094 | $37,745 |
| 2025* | $44,764 | $38,598 |