State No. of registered patients Population Patients per 100,000 population

Colorado 82,089 5,029,196 163.2

Oregon 57,386 3,831,074 149.8

Montana 14,364 989,415 145.2

Michigan 131,483 9,883,640 133.0

Hawaii 11,695 1,360,301 86.0

Rhode Island 4,466 1,052,567 42.4

Arizona 22,037 6,392,017 34.5

New Mexico 4,310 2,059,179 20.9

Maine 2,708 1,328,361 20.4

Nevada 3,388 2,700,551 12.5

Vermont 505 625,741 8.1

Alaska 538 710,231 7.6

California 9,637 37,253,956 2.6

Sources: State agencies responsible for maintaining patient registries

(Patient registration is mandatory in Delaware, New Jersey and the District of Columbia, but their registries are not yet up and running. Washington state has neither voluntary nor mandatory registration.)

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