| Year | Total Expenses | Average Net Price |
|---|---|---|
| 2015 | $31,466 | $14,432 |
| 2016 | $32,239 | $15,302 |
| 2017 | $32,163 | $14,860 |
| 2018 | $32,163 | $13,932 |
| 2019 | $33,849 | $15,612 |
| 2020 | $35,311 | $17,074 |
| 2021* | $36,180 | $18,104 |
| 2022* | $37,070 | $19,195 |
| 2023* | $37,982 | $20,353 |
| 2024* | $38,916 | $21,580 |
| 2025* | $39,873 | $22,881 |