Via Syracuse University's TRAC:

In recent years somewhat over one in four detained individuals were ultimately successful in obtaining an Immigration Court custody decision that allowed them to be released by posting a bond[1]. So far this year, this success rate has been 30.5 percent, up from 18.4 percent during FY 2014. See Figure 1. Percent of Detained Individuals Granted Bond in Immigration Court, FY 2014 - FY 2018.

This increase occurred primarily because more and more of those detained are receiving custody hearings. Judges have been actually no more willing to grant bond at these hearings. During FY 2014 in slightly less than half the cases (48.8%) were bond motions granted. A slightly lower proportion (47.1%) have been granted during FY 2018.
Nationally, for bond hearings thus far during FY 2018, the median bond amount set was $7,500. This amount is up by 50 percent from the median of $5,000 five years ago.

A median bond amount of $7,500 means half of all individuals who were successful in having their motions granted had to post a bond of $7,500 or more. Nearly 40 percent had to post a bond of $10,000 or more. Five percent had their bond amount set at $25,000 or more. Only 1 percent were released without having to post a dollar bond. And only one in twenty had a bond amount that was less than $2,500. See Table 1 for details on bond amounts at the end of this report.

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