|Year|Place|Gold|Silver|Bronze|
|---|---|---|---|---|
|1970|Phoenix|United States of America Sally Carroll Lucile Chambliss Barbara Hile|Soviet Union Nadezda Ibragimova Nina Rasskazova Nina Stoliarova|Federal Republic of Germany Ortrud Feickert Karin Fitzner Ruth Kasten|
|1974|Thun|Soviet Union Galina Zarikova Zinaida Simonian Nina Stoliarova|Czechoslovakia Tereza Bohinska Bedriska Hykova Katarina Pastorova|Australia Judith Harrison Enid Newton Gloria Vause|
|1978|Seoul|Denmark Kirsten Broge Bonnie Bruun Aase Havsteen|Australia Julie Aitken Patricia Dench Lynne Uden|United States of America Sally Carroll Kimberly Dyer Ruby Fox|
|1982|Caracas|Soviet Union Marina Dobrantcheva Inna Rose Auksne Treinite|Hungary Palma Balogh Marta Kotroczo Gabriella Kanyai|People's Republic of China Jianmin Gao Zhifang Wen Cui Qing Yang|
|1986|Suhl|Soviet Union Marina Dobrantcheva Irina Kotcherova Nino Salukvadze|France Martine Guepin Evelyne Manchon Corine Serra-Tosio|Albania Diana Mata Emanuela Delilaj Edlira Shyti|
|1990|Moscow|Soviet Union Yauheniya Haluza Marina Logvinenko Nino Salukvadze|Sweden Kerstin Bodin Britt Marie Ellis Chris Kajd|People's Republic of China Haiying Liu Duihong Li Meifang Qian|
|1994|Milan|People's Republic of China Xiaoping Fan Duihong Li Lina Wang|Korea Soon Hee Boo Sun Bok Lee Jung Hee Park|Belarus Zhanna Shitik Yauheniya Haluza Yuliya Siniak|
|1998|Barcelona|People's Republic of China Yeqing Cai Luna Tao Yi Sun|Korea Eun Kyung Shin Soon Hee Boo Joo Hyung Seo|Mongolia Munkhbayar Dorjsuren Oyun Davaajantsan Gundegmaa Otryad|
|2002|Lahti|People's Republic of China Luna Tao Ying Chen Duihong Li|Russia Irina Dolgatcheva Galina Beliaeva Svetlana Smirnova|United States of America Elizabeth Callahan Rebecca Snyder Sandra Uptagrafft|
|2006|Zagreb|People's Republic of China Ying Chen Fengji Fei Duihong Li|Belarus Liudmila Chabatar Zhanna Shapialevich Yauheniya Haluza|Germany Munkhbayar Dorjsuren Stefanie Thurmann Claudia Verdicchio|
|2010|Munich|Russia Yulia Alipova Kira Klimova Galina Beliaeva|Serbia Zorana Arunovic Jasna Sekaric Jelena Arunovic|Czech Republic Lenka Maruskova Michaela Musilova Petra Hykova|
|2014|Granada|TBD|TBD|TBD|
|2018|Changwon|TBD|TBD|TBD|

Question: how many world championships had the soviet union won first place in in the 25 metre pistol women's world championship?
Answer: 4