| Year | Total Expenses | Average Net Price |
|---|---|---|
| 2015 | $32,404 | $20,556 |
| 2016 | $33,100 | $21,328 |
| 2017 | $33,602 | $18,516 |
| 2018 | $33,602 | $20,707 |
| 2019 | $34,494 | $19,926 |
| 2020 | $35,545 | $20,977 |
| 2021* | $36,309 | $21,766 |
| 2022* | $37,090 | $22,584 |
| 2023* | $37,887 | $23,433 |
| 2024* | $38,702 | $24,314 |
| 2025* | $39,534 | $25,229 |