[ RadSafe ] Doubts on Cancer Statistics

[Emilio Martinez]

Hello Radsafers, searching for cancer statistics i run across "http://statecancerprofiles.cancer.gov" where I found a peak in the number of cancer cases around 1990. Could someone explain the reason of this to me? shouldn't this behaviour be unsual?

The first one provides a clearer view of what i'm talking about, the second page was a string-generated one I made to check he tendencies in every state, although it takes a few seconds to load:



http://statecancerprofiles.cancer.gov/historicaltrend/joinpoint.withimage.php?0&9900&999&7599&001&001&00&0&0&0&2&0&1&6&9901!001!001!00!0!2!0&9902!001!001!00!0!2!0&9904!001!001!00!0!2!0&9905!001!001!00!0!2!0&9906!001!001!00!0!2!0#graph


http://statecancerprofiles.cancer.gov/historicaltrend/joinpoint.withimage.php?0&9900&999&7599&001&001&00&0&0&0&2&0&1&57&9901!001!001!00!0!2!0&9902!001!001!00!0!2!0&9903!001!001!00!0!2!0&9904!001!001!00!0!2!0&9905!001!001!00!0!2!0&9906!001!001!00!0!2!0&9907!001!001!00!0!2!0&9908!001!001!00!0!2!0&9909!001!001!00!0!2!0&9910!001!001!00!0!2!0&9911!001!001!00!0!2!0&9912!001!001!00!0!2!0&9913!001!001!00!0!2!0&9914!001!001!00!0!2!0&9915!001!001!00!0!2!0&9916!001!001!00!0!2!0&9917!001!001!00!0!2!0&9918!001!001!00!0!2!0&9919!001!001!00!0!2!0&9920!001!001!00!0!2!0&9921!001!001!00!0!2!0&9922!001!001!00!0!2!0&9923!001!001!00!0!2!0&9924!001!001!00!0!2!0&9925!001!001!00!0!2!0&9926!001!001!00!0!2!0&9927!001!001!00!0!2!0&9928!001!001!00!0!2!0&9929!001!001!00!0!2!0&9930!001!001!00!0!2!0&9931!001!001!00!0!2!0&9932!001!001!00!0!2!0&9933!001!001!00!0!2!0&9934!001!001!00!0!2!0&9935!001!001!00!0!2!0&9936!001!001!00!0!2!0&9937!001!001!00!0!2!0&9938!001!001!00!0!2!0&9939!001!00
1!00!0!2!0&9940!001!001!00!0!2!0&9941!001!001!00!0!2!0&9942!001!001!00!0!2!0&9943!001!001!00!0!2!0&9944!001!001!00!0!2!0&9945!001!001!00!0!2!0&9946!001!001!00!0!2!0&9947!001!001!00!0!2!0&9948!001!001!00!0!2!0&9949!001!001!00!0!2!0&9950!001!001!00!0!2!0&9951!001!001!00!0!2!0&9952!001!001!00!0!2!0&9953!001!001!00!0!2!0&9954!001!001!00!0!2!0&9955!001!001!00!0!2!0&9956!001!001!00!0!2!0#graph


Thanks a lot in advance


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