MUMBAI, India — Maqbool Beg has been driving a rickshaw for 42 years. Now, at the age of 62, his children have grown, his beard has turned white, his teeth are red from years of chewing betel nut. And he suffers from high blood pressure. But he keeps on driving.

He needs the money. Thanks to inflation and the high cost of living in Mumbai, Beg has never been able to save. The 4,500 rupees (about $100) he earns a month make him ineligible for even a small government handout. Beg and his wife cannot rely on their sons, who earn even less working as a tailor and mechanic.

“Until I can no longer work, I will work,” he said, waiting outside a mobile health van in Bandra East, a suburb of Mumbai.

Beg is one of India’s 81 million elderly (technically, those over 60). While much of the attention on India’s population focuses on its young, the country also faces a rapidly growing elderly segment.

About half of India’s 1.2 billion people are younger than 25. India’s youth are often touted as the country’s best hope for one day surpassing China in economic growth rates.

Every year, India increases by the size of the population of Australia, and many blame nagging poverty on such stats. In some parts of India, local officials are taking extreme measures to try to curb numbers of children in families. In poor northern states like Bihar and Uttar Pradesh, an average woman still bears four children over her lifetime.

But, as with many things in India, the problem of too many children presents a contradiction.

It turns out that, overall, family planning efforts and rapid social development have resulted in lower fertility rates in most Indian states. Fertility rates have fallen from about six births per woman in the 1960s and 1970s to about 2.6 births in 2008, according to the U.N. Population Fund.

Smaller families and longer life spans have set India on a path to facing a massive population of elderly, say advocates for the aging and demographers.

Due to changes in social norms and the ongoing breakdown of joint families, much of this population of elderly will not have India’s traditional family system to support them. Furthermore, the state has not put into place adequate services for the aging, say advocates. The elderly — long deeply respected and honored in Indian culture — will be left to fend for themselves.

India’s population over 60 is expected to more than triple by 2050, and its 80-plus population is expected to quintuple, according to an article, “India’s Baby Boomers: Dividend or Disaster?” by David E. Bloom, a professor of economics and demography at Harvard University’s School of Public Health.

Activists and experts fear India is not in a position to handle so many old folks.

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