The chart shows the annual rate of global population growth according to historical estimates and projections from the UN World Population Prospects.
The growth rate peaked in 1963 at over 2% per year, and since then, it has more than halved, falling to less than 1% by 2020.
The UN demographers expect rates to continue falling until the end of the century, eventually leading to negative growth rates and a shrinking global population.
Source: Our World in Data.

It is for the increasingly small number of working age people having to pay the retirement and medical expenses of the increasingly large number of old people.
People are unable to afford groceries for themselves and having even 1 or 2 children on an already strained budget and that budget is from both parents working 2 jobs.
The retirement system was conceptualised in an age when 1 household could support itself with 1 income while having 3-5 children and could also afford a car, house and vacation, none of that is possible these days and keeps getting worse so declining population is the direct consequence for worsening standard of life.
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