Silicosis is a form of lung disease caused by inhaling silica particles. The disease was seen in Australia in the 1940's to 1960's in construction and demolition workers. There has been increasing concern that the manufacture of stone kitchen benchtops is leading to a re-emergence of silicosis. In 2010, researchers identified 2,123 construction workers employed in areas where they were exposed to high levels of silica dust, while a further 2,666 construction workers were identified as not exposed. At the beginning of the study in 2010 all employees were free from silicosis. The entire study sample was reassessed again after 10 years in 2020 to establish the risk of silicosis. The findings at the 10-year assessment are provided in the table below.

		Silicosis
		Yes	No	Total
Fine dust exposure	Yes	234	1889	2,123
No	25	2641	2666

Calculate the appropriate measure of frequency of disease with the available data (per 1000 persons) for: -The exposed workers

-The unexposed workers

- All the workers.