recovered	year	wood	marked
5	1	oak	75
3	2	oak	75
1	3	oak	75
2	4	oak	75
1	5	oak	75
0	6	oak	75
1	7	oak	75
3	1	ash	49
3	2	ash	49
2	3	ash	49
0	4	ash	49
0	5	ash	49
2	6	ash	49
0	7	ash	49
8	1	birch	128
5	2	birch	128
5	3	birch	128
1	4	birch	128
3	5	birch	128
0	6	birch	128
0	7	birch	128