| Year | Total Expenses | Average Net Price |
|---|---|---|
| 2015 | $26,037 | $16,320 |
| 2016 | $27,445 | $18,975 |
| 2017 | $28,621 | $20,061 |
| 2018 | $28,621 | $19,874 |
| 2019 | $28,966 | $19,994 |
| 2020 | $27,957 | $18,985 |
| 2021* | $28,295 | $19,099 |
| 2022* | $28,638 | $19,214 |
| 2023* | $28,984 | $19,329 |
| 2024* | $29,335 | $19,445 |
| 2025* | $29,690 | $19,561 |
