Sri Lanka Labour Force Survey was designed to measure the levels and trends of employment, unemployment and labour force in Sri Lanka. This survey is being conducted quarterly by the Sample Survey division since the first quarter of 1990.   Sample Survey Division : Tel: + 94 11 2508689/ +94 11 2508690, e-mail: sample.survey@statistics.gov.lk Survey Questionnaire used to collect data on labour force, and international classification of Industries and Occupations are given below.   Explanatory Notes: Sri Lanka Labour Force SurveySurvey Schedule - Sri Lanka Labour Force SurveyInternational standard classification of industry revision - 3International standard classification of occupation (isco - 88)   http://www.statistics.gov.lk/page.asp?page=Labour%20Force" rel="nofollow" target="_blank">http://www.statistics.gov.lk/page.asp?page=Labour%20Force">http://www.statistics.gov.lk/page.asp?page=Labour%20Force