| Year | Total Expenses | Average Net Price |
|---|---|---|
| 2015 | $35,380 | $19,761 |
| 2016 | $35,510 | $18,948 |
| 2017 | $36,240 | $22,058 |
| 2018 | $36,240 | $24,618 |
| 2019 | $39,230 | $28,933 |
| 2020 | $41,196 | $30,899 |
| 2021* | $42,045 | $34,486 |
| 2022* | $42,911 | $38,490 |
| 2023* | $43,795 | $42,959 |
| 2024* | $44,697 | $47,946 |
| 2025* | $45,618 | $53,513 |