| Year | Total Expenses | Average Net Price |
|---|---|---|
| 2015 | $24,502 | $18,133 |
| 2016 | $26,213 | $20,263 |
| 2017 | $27,310 | $21,472 |
| 2018 | $27,310 | $21,578 |
| 2019 | $28,327 | $22,292 |
| 2020 | $28,389 | $22,354 |
| 2021* | $29,445 | $23,094 |
| 2022* | $30,540 | $23,858 |
| 2023* | $31,677 | $24,648 |
| 2024* | $32,855 | $25,464 |
| 2025* | $34,077 | $26,307 |
