| Year | Total Expenses | Average Net Price |
|---|---|---|
| 2015 | $21,010 | $12,894 |
| 2016 | $21,875 | $13,059 |
| 2017 | $22,607 | $13,106 |
| 2018 | $22,607 | $14,562 |
| 2019 | $24,806 | $15,052 |
| 2020 | $25,376 | $15,622 |
| 2021* | $26,226 | $16,147 |
| 2022* | $27,105 | $16,689 |
| 2023* | $28,013 | $17,250 |
| 2024* | $28,951 | $17,830 |
| 2025* | $29,921 | $18,429 |