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Working with Bedouin women of the Negev Desert on a weaving project for the past 20 years , Oxfam has recently expanded its programme to tackle the harsh and long-standing discriminatory policies against the Bedouin community living in Israel . " In the past 20 years , the computer has given experimentalists more direct feedback , partly by speeding computation and lowering the costs of solving larger problems and partly by enabling researchers to develop and test models quickly . Victim Services Division within the Austin law enforcement agency over the past 20 years , Hutchison developed an approach that could help others who want to start a similar program . In the past 20 years , China has lifted more than 200 million people out of poverty . In addition , South Asian migrants have begun to respond to new labour demands in the past 20 years , particularly from South East Asia .