Table 1. Costa Rica: Incidence rate of retinoblastoma per 10,000 persons by age group—HNN, 2009–2015 : (N = 36 patients).

Year	Births	Population 1–3 years	Population 5–7 years	New cases of retinoblastoma			Incidence rate * 10,000 people
				< 1 year	1–3 years	5–7 years	< 1 year	1–3 years	5–7 years
2009	75,000	215,522	219,882	2	5	0	0.27	0.23	0.00
2010	70,922	219,906	216,542	1	6	1	0.14	0.27	0.05
2011	73,459	222,845	217,659	2	2	0	0.27	0.09	0.00
2012	73,326	218,840	216,597	1	1	1	0.14	0.05	0.05
2013	70,550	216,934	219,039	1	4	0	0.14	0.18	0.00
2014	71,793	217,854	222,967	2	3	0	0.28	0.14	0.00
2015	71,819	222,299	225,235	2	1	1	0.28	0.04	0.04

Source: patient records, HNN, National Statistics and Census Institute, Information Center.