Table:
outcome variable
regression results

coefficient
standard error

log of wages
-0.036
0.020

employed full time
-0.083
0.023

employed in permanent job
-0.003
0.023

covered by collective bargaining agreement
-0.551
0.015

union membership
-0.605
0.018

Statement: they were far less likely to be covered by a collective bargaining agreement.
Question: what was the percentage points were they far less likely to be covered by a collective bargaining agreement?
Answer: [-0.551]