| Year | Total Expenses | Average Net Price |
|---|---|---|
| 2015 | $35,060 | $28,346 |
| 2016 | $35,096 | $29,021 |
| 2017 | $33,464 | $26,786 |
| 2018 | $33,464 | N/A |
| 2019 | $34,909 | $26,914 |
| 2020 | $35,220 | $27,225 |
| 2021* | $35,255 | $27,541 |
| 2022* | $35,290 | $27,860 |
| 2023* | $35,326 | $28,183 |
| 2024* | $35,361 | $28,510 |
| 2025* | $35,396 | $28,841 |