噪声测定数据(dB)如下:80,76,76,73,72,71,71,71,71,67,67,67,67,67,67,67,62,61,61,61,60,60,60,60,60,59,59,70,70,70,70,70,70,70,70,70,70,70,70,70,58,58,58,58,57,57,55,55,55,63,63,62,62,62,62,62,62,62,65,65,65,65,65,65,65,65,65,64,64,64,69,69,69,69,69,69,66,66,66,66,66,66,66,66,66,66,66,66,68,68,68,68,68,68,68,68,68,68,68,68。求Leq为( )。