Table 1. Number of newly registered HD cases in South Korea during 2010–2019.

Year	Total population	Number of newly registered patients with HD	Cumulative number of new HD cases	Number of patients with HD who used medical service in each year	Estimated annual incidence (/100,000 persons)	Estimated cumulative incidence (/100,000 persons)
2010	50,515,666	144	144	144	0.29	0.29
2011	50,734,284	173	317	210	0.34	0.63
2012	50,948,272	168	485	230	0.33	0.95
2013	51,141,463	166	651	257	0.32	1.28
2014	51,327,916	150	801	281	0.29	1.57
2015	51,529,338	119	920	284	0.23	1.80
2016	51,696,216	139	1,059	328	0.27	2.07
2017	51,778,544	159	1,218	385	0.31	2.38
2018	51,826,059	143	1,361	414	0.28	2.65
2019	51,849,861	160	1,521	453	0.31	2.96

The total South Korean population was derived from resident registration data (in December of each year). Estimated annual incidence in each year=(new HD registration cases)/10⁵×(total South Korean population in each year). Estimated annual cumulative incidence from the beginning to the corresponding year=(total number of new cases during the study period)/10⁵×(average total South Korean population). HD, Huntington’s disease.