| Year | Total Expenses | Average Net Price |
|---|---|---|
| 2015 | $20,402 | $15,000 |
| 2016 | $21,094 | $15,184 |
| 2017 | $22,448 | $16,742 |
| 2018 | $22,448 | $16,549 |
| 2019 | $23,078 | $16,310 |
| 2020 | $23,694 | $16,926 |
| 2021* | $24,360 | $17,134 |
| 2022* | $25,044 | $17,345 |
| 2023* | $25,748 | $17,558 |
| 2024* | $26,472 | $17,774 |
| 2025* | $27,215 | $17,993 |