| Year | Total Expenses | Average Net Price |
|---|---|---|
| 2015 | $21,132 | $15,184 |
| 2016 | $21,796 | $15,964 |
| 2017 | $22,402 | $14,957 |
| 2018 | $22,402 | $14,570 |
| 2019 | $23,000 | $14,181 |
| 2020 | $23,743 | $14,924 |
| 2021* | $24,403 | $14,537 |
| 2022* | $25,081 | $14,161 |
| 2023* | $25,779 | $13,794 |
| 2024* | $26,495 | $13,437 |
| 2025* | $27,232 | $13,089 |
