| Year | Total Expenses | Average Net Price |
|---|---|---|
| 2015 | $26,146 | $20,364 |
| 2016 | $26,141 | $20,585 |
| 2017 | $22,077 | $17,000 |
| 2018 | $22,077 | $16,849 |
| 2019 | $21,793 | $15,514 |
| 2020 | $21,862 | $15,583 |
| 2021* | $21,858 | $15,444 |
| 2022* | $21,853 | $15,307 |
| 2023* | $21,849 | $15,171 |
| 2024* | $21,845 | $15,036 |
| 2025* | $21,840 | $14,902 |
