| Year | Total Expenses | Average Net Price |
|---|---|---|
| 2015 | $20,035 | $11,367 |
| 2016 | $21,772 | $12,464 |
| 2017 | $22,870 | $13,156 |
| 2018 | $22,870 | $14,444 |
| 2019 | $23,700 | $13,250 |
| 2020 | $24,295 | $13,845 |
| 2021* | $25,177 | $14,613 |
| 2022* | $26,091 | $15,424 |
| 2023* | $27,038 | $16,280 |
| 2024* | $28,019 | $17,184 |
| 2025* | $29,037 | $18,138 |