$arr_chu = array(
	array('1.02','0.25','0.8'),
	array('0.96','0.25','0.88'),
	array('0.92','0.25','0.92'),
	array('0.76','0.5','1.10'),
	array('0.82','0.25','1.03'),
	array('0.83','0.5','0.92'),
	array('1.00','0.25','0.82'),
	array('0.85','0.5','1.00')
);
echo '<pre>';
print_r(array_count_values(array_column($arr_chu,1)));