"obs","trat","xx","yy"
"1",1,21,38
"2",2,34,43
"3",3,23,24
"4",1,26,39
"5",2,26,38
"6",3,29,32
"7",1,22,36
"8",2,29,38
"9",3,30,31
"10",1,28,45
"11",2,18,27
"12",3,16,21
"13",1,19,33
"14",2,25,34
"15",3,29,28