| Year | Total Expenses | Average Net Price |
|---|---|---|
| 2015 | $32,500 | $19,462 |
| 2016 | $33,400 | $18,311 |
| 2017 | $34,390 | $19,113 |
| 2018 | $34,390 | $19,760 |
| 2019 | $35,840 | $19,440 |
| 2020 | $36,980 | $20,580 |
| 2021* | $38,075 | $21,278 |
| 2022* | $39,202 | $21,999 |
| 2023* | $40,362 | $22,745 |
| 2024* | $41,557 | $23,516 |
| 2025* | $42,787 | $24,313 |