| Year | Total Expenses | Average Net Price |
|---|---|---|
| 2015 | $24,480 | $16,050 |
| 2016 | $24,711 | $14,547 |
| 2017 | $25,681 | $15,484 |
| 2018 | $25,681 | $16,094 |
| 2019 | $27,636 | $15,006 |
| 2020 | $28,266 | $15,636 |
| 2021* | $28,910 | $16,252 |
| 2022* | $29,570 | $16,892 |
| 2023* | $30,244 | $17,558 |
| 2024* | $30,933 | $18,250 |
| 2025* | $31,639 | $18,969 |