Japan’s population has dropped for the fourth year in a row, bringing it to a low not seen since 2000.

There were just more than 127 million people living in Japan as of last Oct. 1, which marked a decrease of 215,000 people compared with one year earlier, according to newly released government data reported by the Guardian.

The biggest problem for Japan may be the rate at which its population is aging. The number of people age 65 or older in Japan has reached 33 million. More than 1 in 4 people are older than 65 and they outnumber people 14 and younger 2 to 1. The government estimates the population will drop to 86.7 million by 2060, with people over 65 making up 40% of the country.

Though the problem of falling birthrates and aging population is particularly acute in Japan, a similar problem is also brewing in Europe and the U.S. The federal government’s data from late last year showed that 2013 birthrates hit a record low in the U.S. in 2013, down 9% from a high in 2007, as American women delay having children.

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