| Year | Total Expenses | Average Net Price |
|---|---|---|
| 2015 | $24,099 | $16,783 |
| 2016 | $24,589 | $16,702 |
| 2017 | $25,594 | $16,745 |
| 2018 | $25,594 | $18,324 |
| 2019 | $27,070 | $19,429 |
| 2020 | $28,088 | $20,447 |
| 2021* | $29,144 | $21,518 |
| 2022* | $30,240 | $22,646 |
| 2023* | $31,377 | $23,833 |
| 2024* | $32,557 | $25,081 |
| 2025* | $33,781 | $26,396 |