| Year | Total Expenses | Average Net Price |
|---|---|---|
| 2015 | $18,226 | $10,457 |
| 2016 | $18,876 | $10,863 |
| 2017 | $19,346 | $11,453 |
| 2018 | $19,346 | $11,348 |
| 2019 | $20,235 | $12,210 |
| 2020 | $20,745 | $12,720 |
| 2021* | $21,268 | $13,252 |
| 2022* | $21,804 | $13,806 |
| 2023* | $22,353 | $14,383 |
| 2024* | $22,916 | $14,984 |
| 2025* | $23,494 | $15,610 |