How does the U.S. rate in terms of retirement security with the rest of the world?

Not exactly bad, but at the same time, the U.S. failed to make the top 10 in the 2018 Global Retirement Index.

The index, which is a product of Natixis Investment Managers, tracks 18 factors across four sub-indices—finances, material well-being, quality of life and health—to provide a baseline for retirement security around the world.

The U.S. placed 16th on the latest ranking, moving up two spots since the last index report in 2016, just behind the Czech Republic at 15 and just ahead of the U.K. at 17.

The U.S. saw a slight decline in people aged 65 or over since 2000, according to the report, while Japan’s aging population increased more than 15 percent since 1990, causing that nation to wind up at 22 on the list. The aging population globally increased about 5 percent since 1990.

Lengthening lifespans are making retirement security a burgeoning issue throughout the world, according to the latest index report.

"If we are to look to a future when ... 17 percent of the total global population will be over age 65 by 2050, we must view global retirement security as a multi-dimensional problem at the leading edge of human sustainability," the report stated.

Natixis Investment Managers and CoreData Research complied data from May of 2018.

These countries, in ascending order, provide its citizens with the best retirement security in the world, according to the index:

10. Netherlands

The country fell to 10 from 8 since 2016. However, the country scored a 90 out of 100 in the health category, while the finances in retirement index was only at 58.