According to Wikipedia:
>In Canada, the national conviction rate is about 97%. This does not include cases in which the charges are dropped, which comprise about one-third of criminal cases. Absent Quebec, the province with the lowest conviction rate, the figure is 99%.
If a country has a low conviction rate, it could be because cops are arresting lots of innocent people. It could be because courts are being bribed and letting people go. High conviction rates can mean anything from police only arresting people when they know a person is guilty, to them picking up anyone off the street and throwing them away without a fair trial. Percentage alone, generally, isn't something worth looking into.