| Year | Total Expenses | Average Net Price |
|---|---|---|
| 2015 | $18,958 | $12,238 |
| 2016 | $20,551 | $15,214 |
| 2017 | $20,888 | $14,316 |
| 2018 | $20,888 | $14,323 |
| 2019 | $21,532 | $15,282 |
| 2020 | $22,500 | $16,250 |
| 2021* | $23,193 | $17,279 |
| 2022* | $23,907 | $18,372 |
| 2023* | $24,644 | $19,535 |
| 2024* | $25,403 | $20,772 |
| 2025* | $26,185 | $22,087 |