Please read the following table in Markdown format and then answer the question according to the table. Table cells in one row are seperated by '|', and different rows are seperated by '
'.

Table:
| Year | Location | Gold | Silver | Bronze |
| --- | --- | --- | --- | --- |
| 1950 | Basel | Helena Rakoczy | Tereza Kočiš | Stefania Reindlova |
| 1954 | Rome | Tamara Manina | Eva Bosáková | Maria Gorokovskaya |
| 1958 | Moscow | Eva Bosáková | Larisa Latynina | Keiko Tanaka |
| 1962 | Prague | Larisa Latynina | Irina Pervuschina | Věra Čáslavská |
| 1966 | Dortmund | Natalia Kutchinskaya | Věra Čáslavská | Zinaida Drougina |
| 1970 | Ljubljana | Ludmila Turicheva | Olga Karaseva | Zinaida Voronina |
| 1974 | Varna | Ludmila Turicheva | Olga Korbut | Elvira Saadi\n Rusudan Siharulidze |
| 1978 | Strasbourg | Nellie Kim\n Elena Mukhina | - | Emilia Eberle\n Kathy Johnson |
| 1979 | Fort Worth | Emilia Eberle | Nellie Kim | Melita Ruhn |
| 1981 | Moscow | Natalia Ilienko | Yelena Davydova | Zoja Grantcharova |
| 1983 | Budapest | Ekaterina Szabo | Olga Mostepanova | Boriana Stoyanova |
| 1985 | Montreal | Oksana Omelianchik | Elena Shushunova | Ulrike Klotz |
| 1987 | Rotterdam | Daniela Silivaş\n Elena Shushunova | - | Aurelia Dobre |
| 1989 | Stuttgart | Daniela Silivaş\n Svetlana Boguinskaya | - | Cristina Bontaş |
| 1991 | Indianapolis | Cristina Bontaş\n Oksana Chusovitina | - | Kim Zmeskal |
| 1992 | Paris | Kim Zmeskal | Henrietta Ónodi | Maria Neculiţă\n Tatiana Lysenko |
| 1993 | Birmingham | Shannon Miller | Gina Gogean | Natalia Bobrova |
| 1994 | Brisbane | Dina Kochetkova | Lavinia Miloşovici | Gina Gogean |
| 1995 | Sabae | Gina Gogean | Ji Liya | Ludivine Furnon |
| 1996 | San Juan | Kui Yuan-Yuan\n Gina Gogean | - | Liubov Sheremeta\n Lavinia Miloşovici |
| 1997 | Lausanne | Gina Gogean | Svetlana Khorkina | Elena Produnova |
| 1999 | Tianjin | Andreea Răducan | Simona Amânar | Svetlana Khorkina |
| 2001 | Ghent | Andreea Răducan | Daniele Hypólito | Svetlana Khorkina |
| 2002 | Debrecen | Elena Gómez | Verona van de Leur | Samantha Sheehan |
| 2003 | Anaheim | Daiane Dos Santos | Cătălina Ponor | Elena Gómez |
| 2005 | Melbourne | Alicia Sacramone | Anastasia Liukin | Suzanne Harmes |
| 2006 | Aarhus | Cheng Fei | Jana Bieger | Vanessa Ferrari |
| 2007 | Stuttgart | Shawn Johnson | Alicia Sacramone | Cassy Vericel |
| 2009 | London | Elizabeth Tweddle | Lauren Mitchell | Sui Lu |
| 2010 | Rotterdam | Lauren Mitchell | Aliya Mustafina\n Diana Chelaru | - |
| 2011 | Tokyo | Ksenia Afanasyeva | Sui Lu | Aly Raisman |
| 2013 | Antwerp | Simone Biles | Vanessa Ferrari | Larisa Iordache |
| 2014 | Nanning |  |  |  |
| 2015 | Glasgow |  |  |  |
Question:
how many times was the world artistic gymnastics championships held in the united states?
Answer:
3