Only Russia 's Yuliya Efimova has been faster ( 1 : 05.70 ) .
The two European women represent the only sub-1 : 06 breaststrokers of 2016 .
Only Russia 's Yuliya Efimova has been faster ( 1 : 05.70 ) and the two European women represent the only sub-1 : 06 breaststrokers of 2016 .