Cancer Cases Per Decade
Thank you for your question on liver cancer, pancreas cancer and total cancer cases. We extensively researched the last 50 years to determine the number of cancer numbers in each category. Below is a detailed description of how we determined each number and the final numbers can be found in the spreadsheet here.
While researching to determine the total number of cancer cases per decade some findings were inconclusive for the years between 1960-1970. The government did not record new cancer cases until 1973 when information from 5 US states was available. However, we were able to find the actual and estimated death total from cancer in general, lung cancer in this time period. Information for pancreas cancer was not found. The total cancer estimates for this time period were 400,000 cases, and for lung cancer, about 95,000 cases. The source for this information can be found here. Below is how we figured out the numbers for each section in the spreadsheet.
In order to conclude the number of cancer cases requested for all the decades between 1970 and the present we first found the average “cancer incidences rate per 100,000 population” for each decade. We did this by adding each annual cancer total in the specific decade together and dividing that number by 10. We repeated this process for total cancer, liver cancer and pancreas cancer.
After, to find the total number of people with the specific type of cancers listed we divided the "US Census Bureau’s Population" for that decade by 100,000. We then took this number and multiplied it by the “average rate per 100,000” that we concluded in the first section. We repeated this process for the total number of cancer cases, liver cancer cases and pancreas cancer cases.
Finally, to find the total number of cancer cases in each decade we found the number of cases each year in each decade and multiplied this number by 10. Our findings are listed in the spreadsheet provided.
Although there was no concrete information between the years of 1960 and 1970 we were able to find the estimated death rates of cancer in those years. From the 70s to the present we were able to calculate for each category and decade to determine each figure.