Here is a link to the Los Angeles County Registrar of Voters’ web page, showing the number of registered voters in each qualified party as of December 25. There has been no registration tally for California since February 2013, and there won’t be a new one until early next year, so the Los Angeles data is one method to track new trends in California registration. Over 25% of California’s population lives in Los Angeles County.
Here is a link to a past BAN post, showing the Los Angeles County data as of November 20, 2013. Although the differences between November 2013 and December 2013 are miniscule, the changes are that the two major parties, along with the Green Party, have a slightly lower share of the registration. All other ballot-qualified parties have increased, percentagewise. As a percentage, the number of “declines to state” voters has decreased, but the number of members of unqualified parties, combined with the people who simply leave that question blank on the form, has increased.