| Year | Total Expenses | Average Net Price |
|---|---|---|
| 2015 | $18,241 | $12,214 |
| 2016 | $19,035 | $12,687 |
| 2017 | $19,685 | $13,480 |
| 2018 | $19,685 | $13,215 |
| 2019 | $21,012 | $13,896 |
| 2020 | $21,259 | $14,143 |
| 2021* | $21,984 | $14,690 |
| 2022* | $22,734 | $15,259 |
| 2023* | $23,509 | $15,849 |
| 2024* | $24,310 | $16,463 |
| 2025* | $25,139 | $17,100 |
