Country of inventor and assignee, for USPTO issued patents mentioning cancer

On July 3, 2011, I searched the USPTO database patents issued from 1995 to 2010 that mention the word cancer in the specification field. There were a total of 81,062 such patents. Then I narrowed the search to find out how many patents have at least one inventor (there are often multiple inventors). who was listed as a resident of a country other than the U.S. The number of patents by country of the inventor are reported in figure 1.

Figure 1, By country of inventor:

I then searched the database, using the same criteria for dates and specifications, for the (non-US) country of the entity receiving the assignment of the patent. These results are reported in Figure 2.

Figure 2: Patents by country of assignee:

I then repeated this for the 50 U.S. states and the District of Columbia.

Figure 3: Patents by U.S. state of assignee: