What is the time frame in which most pension plans were determined to be sustainable as per the provided information?

The period from 2012 to 2022 is significant in the context of pension plans being deemed sustainable due to various reforms and evaluations that occurred during this time. This decade saw increased scrutiny of pension funding levels, emerging financial conditions, and demographic shifts such as aging populations. These factors contributed to a broader understanding of what constitutes sustainability in the context of public and private pension systems.

Efforts were made to adjust benefits, increase contributions, or reform governance structures to ensure that pension plans could meet their long-term obligations without undue strain on state or municipal budgets. The conclusion that sustainability is achievable within this timeframe aligns with analyses of the financial health of pension plans, which showed improvements in both funding statuses and actuarial assumptions.

Analyzing trends from prior and subsequent periods showcases the distinct challenges and results experienced in those eras, making the 2012 to 2022 timeframe particularly noteworthy as a transitional period towards stronger pension governance and funding practices.