| Year | Total Expenses | Average Net Price |
|---|---|---|
| 2015 | $25,690 | $19,372 |
| 2016 | $26,753 | $20,402 |
| 2017 | $27,284 | $19,428 |
| 2018 | $27,284 | $19,414 |
| 2019 | $29,814 | $21,419 |
| 2020 | $30,272 | $21,877 |
| 2021* | $30,871 | $22,345 |
| 2022* | $31,483 | $22,823 |
| 2023* | $32,106 | $23,312 |
| 2024* | $32,742 | $23,811 |
| 2025* | $33,390 | $24,320 |
