Category	Period	Number
1		5.8	98
1		15	51
1		21.5	34
1		27.5	35
1		33.5	32
1		39.5	23
1		46	12
1		51.5	4
2		5.8     0
2		15      2
2		21.5    6
2		27.5    5
2		33.5    10
2		39.5    7
2		46      6
2		51.5    2
3		5.8     0
3		15      1
3		21.5    3
3		27.5    8
3		33.5    9
3		39.5    8
3		46      10
3		51.5    5