Highlights of the demographic report released Thursday by the California Department of Finance:

— Within 20 years, California's ethnic composition will be 46.7 percent Hispanic, 30.7 percent white, 13.5 percent Asian, 4.7 percent black and 3.7 percent multiracial; less than 1 percent will be American Indian.

— By 2060, Hispanics will comprise nearly half the state's population, 48 percent.

— California's population will hit 40 million, equivalent to the current population of Argentina, in 2018 or 2019. It is projected to hit 50 million in 2049.

— In 2010, Hispanics were a majority in nine of California's 58 counties; by 2030, that will grow to 13.

— Blacks would slip below 5 percent of the population by 2050.

— By 2060, California will have 13 counties with a population of 1 million or more.

— California's median age will rise from 35 to 42 over the next 50 years, but the state will not age as rapidly as many other states primarily because of immigration.

— Southern California will lead the state's growth over the next half century, adding 8.3 million people by 2060.

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Source: California Department of Finance, Demographic Research Unit; The World Bank.