| Year | Total Expenses | Average Net Price |
|---|---|---|
| 2015 | $24,661 | $15,840 |
| 2016 | $25,808 | $17,346 |
| 2017 | $26,096 | $17,487 |
| 2018 | $26,096 | $16,842 |
| 2019 | $27,630 | $18,361 |
| 2020 | $27,630 | $18,361 |
| 2021* | $27,939 | $18,510 |
| 2022* | $28,252 | $18,660 |
| 2023* | $28,569 | $18,811 |
| 2024* | $28,889 | $18,963 |
| 2025* | $29,212 | $19,117 |