| Year | Total Expenses | Average Net Price |
|---|---|---|
| 2015 | $31,654 | $21,217 |
| 2016 | $32,502 | $21,992 |
| 2017 | $33,303 | $22,606 |
| 2018 | $33,303 | $19,445 |
| 2019 | $35,176 | $21,533 |
| 2020 | $36,200 | $22,557 |
| 2021* | $37,170 | $23,380 |
| 2022* | $38,166 | $24,234 |
| 2023* | $39,189 | $25,118 |
| 2024* | $40,239 | $26,035 |
| 2025* | $41,318 | $26,985 |