Years,x	HTL,y
17.7	58
7.1	21
14.8	37
8.1	19
8.6	20
7.7	22
14.6	35
17.4	54
6.8	22
10.3	24
13.5	31
10.2	22
8.3	21
17.8	60
13.7	31
16.6	48
11.5	26
17.7	56
17	51
14.3	35
