The phrase 'fall into tiers' is correct and can be used in written English.
You can use this phrase to describe a situation in which a group of things is divided into different sections, levels, or tiers. For example, "As the company grows, salaries will fall into tiers, depending on seniority and experience."
Almost as many fall into three tiers of less severe injuries or no injury, including those who sued out of fear that they would get sick.
The rankings, based on the percentages of respondents who mentioned them, fall into three tiers indicated by different shades of blue.
But some travel professionals agree on certain criteria, and on some types of chain hotels that generally fall into each tier.
The remaining seventeen provinces fell into Tier 3; the last tier occupied 54.84 percent of 31 provinces in Mainland China, which showed that the development of preschool education in Mainland China is still at a low level.
More than half the plaintiffs fall into the fourth tier — the most severely injured — and will get about 94 percent of the payout, the lawyers said.
William H. Groner, one of the plaintiffs' lawyers, said that about half the plaintiffs fall into the fourth tier, which he said would account for 94 percent of the settlement payout.
Much of the U.S., China and Europe fall into the cheapest tier.
With the 6.2 update from today, Speed Reader will be free to use ten times each month, and then will fall into the premium tier of the service.
But some fall into a middle tier, including a White House manufacturing initiative, which the Obama administration proposes to fund primarily through a $56 billion Opportunity, Growth, and Security Initiative (OGSI).
In terms of the 'traction hierarchy', active users and letters of intent probably fall into the next tier below real sales, finally followed by viewer numbers (on your website).
