| Year | Total Expenses | Average Net Price |
|---|---|---|
| 2015 | $22,409 | $17,114 |
| 2016 | $22,679 | $17,504 |
| 2017 | $23,331 | $18,397 |
| 2018 | $23,331 | $18,333 |
| 2019 | $24,601 | $19,141 |
| 2020 | $24,997 | $19,537 |
| 2021* | $25,399 | $19,982 |
| 2022* | $25,808 | $20,438 |
| 2023* | $26,224 | $20,904 |
| 2024* | $26,646 | $21,381 |
| 2025* | $27,075 | $21,868 |
