been traditionally disproportionate compared to the national ethnic profile, with a significantly higher proportion of ethnic Malays especially in the earlier decades. However, the number of casualties involving ethnic Chinese police officers are statistically higher overall due in part to the high mortality rates involving the ethnic Chinese community during the Japanese Occupation of Singapore in the 1940s, and they make up 60.7% of total deaths. Notes These ranks no longer exist in the present rank structure of the Singapore Police Force (with the exception of some ranks in the Gurkha Contingent). Includes two Special Constables. Part-time Police National Service was introduced in 1967, and full-time NS in 1975. The Volunteer Special Constabulary began in 1946. Incidents by chronology The following cases are listed by the date of death, although the incident attributing to death may have occurred earlier. The indicated ranks are as at time of death, and do not include posthumous promotions. Ranks/service numbers are colour-coded based on the cause of death as per the following general classifications. Uncoded entries refer to cases whereby incident details are unknown or unclear: Key — denotes information is not available. 1900s 1910s 1920s 1930s 1940s 1950s 1960s 1970s 1980s 1990s 2000s 2010s References External links Singapore Police Force Crime in Singapore Police officers killed Police officers killed Singapore Police Force Singaporean police officers killed in the line of duty Lists of police officers killed in the line of duty Police officers killed in the line of duty