| Year | Total Expenses | Average Net Price |
|---|---|---|
| 2015 | $19,283 | $12,209 |
| 2016 | $19,815 | $12,749 |
| 2017 | $20,109 | $13,989 |
| 2018 | $20,109 | $12,254 |
| 2019 | $23,972 | $15,401 |
| 2020 | $24,531 | $15,960 |
| 2021* | $25,103 | $16,665 |
| 2022* | $25,687 | $17,402 |
| 2023* | $26,286 | $18,171 |
| 2024* | $26,898 | $18,974 |
| 2025* | $27,525 | $19,813 |