evidence: Voter registration rates have been rising, albeit slowly, this century. These increases are partly due to reforms instituted by the NVRA, additional reforms adopted by many states, and the tens of millions of dollars spent by political parties, civic organizations, and some states to register voters each election cycle. [...] Residential mobility also explains why some citizens who thought they were registered cannot vote. Compared to citizens at their address for five or more years, those at their address for less than one year are more than six times as likely to report that a registration problem prevented them from voting. Those who have been at their address for one to two years are more than three times as likely to report such issues (see Table 5). [...] Source: CPS November and December Supplements. Note: Non-responses and respondents stating they are not eligible to register are excluded.