| Year | Total Expenses | Average Net Price |
|---|---|---|
| 2015 | $20,252 | $13,265 |
| 2016 | $20,298 | $13,560 |
| 2017 | $20,698 | $13,968 |
| 2018 | $20,698 | $13,771 |
| 2019 | $22,412 | $14,973 |
| 2020 | $22,866 | $15,427 |
| 2021* | $23,316 | $15,891 |
| 2022* | $23,776 | $16,370 |
| 2023* | $24,244 | $16,862 |
| 2024* | $24,722 | $17,370 |
| 2025* | $25,209 | $17,893 |