A couple on the promenade of the Huangpu River in Shanghai, China, on February 24.
CNN  — 

China last year registered the fewest marriages since its public records began more than three decades ago – adding to concerns the country faces a looming demographic crisis.

There were 7.6 million marriage registrations in 2021, data released by China’s Ministry of Civil Affairs last week shows.

That’s the fewest since 1986, when the ministry began publicly releasing the figures, according to state-run tabloid Global Times. It is a 6.1% decrease from the previous year and the eighth consecutive year marriage rates have fallen.

At the same time, the average age of newlyweds is inching up, with nearly half of those married last year age 30 and above.

The figures reflect a trend that is increasingly a cause for concern among officials in the world’s most populous nation, home to 1.4 billion: young people, especially millennials, are increasingly choosing not to get married or have children – and even when they do, they tend to do so later in life.

Experts say the knock-on effect on what is already a shrinking workforce could have a severe impact on the country’s economy and social stability.

In just six years, the number of Chinese people getting married for the first time fell by 41%, from 23.8 million in 2013 to 13.9 million in 2019, according to China’s National Bureau of Statistics.

The decline is partly due to decades of policies designed to limit China’s population growth, which mean there are fewer young people of marriageable age, according to Chinese officials and sociologists.

But it’s also a result of changing attitudes to marriage, especially among young women who are becoming more educated and financially independent.

Faced with widespread workplace discrimination and patriarchal traditions – such as the expectation for women to be responsible for child care and housework – some women are growing disillusioned with marriage.

Statistics show both genders are delaying marriage. From 1990 to 2016, the average age for first marriages rose from 22 to 25 for Chinese women, and from 24 to 27 for Chinese men, according to the Chinese Academy of Social Sciences.

Global Times also pointed to increasing work pressures for young people, who face stagnating wages, a competitive job market and rising costs of living.

The decline in marriages adds to concerns over China’s looming demographic crisis as it struggles to raise a falling birth rate.

In 2014, the country’s working-age population started to shrink for the first time in more than three decades.

The following year, the Chinese government announced an end to its one-child policy, allowing couples to have two children, then increased that to three children in 2021 – but both marriage and birth rates continued to drop.

China isn’t the only country struggling with this problem.

Japan and South Korea have also faced falling birth rates and shrinking populations in recent years.

Governments in all three countries have introduced measures to encourage births – such as financial incentives, cash vouchers, housing subsidies and more child care support – with limited success.

CNN’s Nectar Gan contributed to this report.