days	ppb
2	2
4	3.5
7	4.65
8	5.05
9	5.22
12	6.11
13	6.19
25	7.26
32	7.92
33	8.15
39	8.42
46	8.92
46	9.18
47	9.02
54	9.51
60	9.78
74	10.45
83	11.36
92	11.78
97	12.08
110	12.8
128	13.6
158	14.7
193	15.9
224	16.9
254	18
284	19.01
314	20
343	21.1
375	22.3
417	23.7
445	24.8
476	25.7
515	26.7
545	27.7
586	28.8
615	29.4
646	30.2
672	30.7
703	31.4
743	32.2
787	33.5
826	34.6
861	35.3
904	36.2
940	37
976	37.7
1010	38.5
1046	39.1
1072	39.5
1081	38.3
1124	38.6
1163	39.6
1201	40.5
1239	41.2
1285	42.2
1320	43
1357	43.6
1398	44.4
1432	45
1467	45.7
1501	46.3
1534	47.1
1560	47.7
1597	48.4
1628	48.9
1659	49.3
1687	49.9
1718	50.35
1748	50.7
1779	51.2
1809	51.5
1850	52
1886	52.6
1914	53
1947	53.45
1984	53.9
2019	54.3
2045	54.5
2071	54.7
2116	55.11
2132	54.97
2165	55.27
2198	55.63
2230	56
2265	56.5
2309	57
2346	57.4
2389	57.85
2434	58.35
2473	58.7
2513	59
2550	59.3
2587	59.65
2625	60
2664	60.35
2696	60.6
2729	60.85
2764	61.15
2796	61.4
2829	61.6
2863	61.85
2898	62.1
2935	62.4
2972	62.8
3007	63.12
3043	63.47
3078	63.73
3114	64.05
3149	64.3
3184	64.5
3224	64.75
3259	64.96
3295	65.23
3332	65.54
3368	65.82
3406	66.09
3441	66.33
3482	66.55
3519	66.72
3563	67.01
3604	67.22
3647	67.59
3692	68.02