rownames,age,smoke,n,y,ns
1,40,0,18790,2,0
2,50,0,10673,12,0
3,60,0,5710,28,0
4,70,0,2585,28,0
5,80,0,1462,31,0
6,40,1,52407,32,52407
7,50,1,43248,104,43248
8,60,1,28612,206,28612
9,70,1,12663,186,12663
10,80,1,5317,102,5317