| Year | Total Expenses | Average Net Price |
|---|---|---|
| 2015 | $25,925 | $19,816 |
| 2016 | $27,944 | $20,725 |
| 2017 | $28,188 | $21,432 |
| 2018 | $28,188 | $19,332 |
| 2019 | $29,085 | $20,460 |
| 2020 | $30,026 | $21,401 |
| 2021* | $30,981 | $22,383 |
| 2022* | $31,966 | $23,411 |
| 2023* | $32,983 | $24,485 |
| 2024* | $34,031 | $25,609 |
| 2025* | $35,114 | $26,785 |