mutual and pooled funds shares of mutual funds are valued at the net asset value ( nav ) quoted on the exchange where the fund is traded and are classified as level 1 assets .units of pooled funds are valued at the per unit nav determined by the fund manager and are classified as level 2 assets .the investments are utilizing nav as a practical expedient for fair value .corporate and government bonds corporate and government bonds are classified as level 2 assets , as they are either valued at quoted market prices from observable pricing sources at the reporting date or valued based upon comparable securities with similar yields and credit ratings .mortgage and asset-backed securities mortgage and asset 2013backed securities are classified as level 2 assets , as they are either valued at quoted market prices from observable pricing sources at the reporting date or valued based upon comparable securities with similar yields , credit ratings , and purpose of the underlying loan .real estate pooled funds real estate pooled funds are classified as level 3 assets , as they are carried at the estimated fair value of the underlying properties .estimated fair value is calculated utilizing a combination of key inputs , such as revenue and expense growth rates , terminal capitalization rates , and discount rates .these key inputs are consistent with practices prevailing within the real estate investment management industry .other pooled funds other pooled funds classified as level 2 assets are valued at the nav of the shares held at year end , which is based on the fair value of the underlying investments .securities and interests classified as level 3 are carried at the estimated fair value of the underlying investments .the underlying investments are valued based on bids from brokers or other third-party vendor sources that utilize expected cash flow streams and other uncorroborated data , including counterparty credit quality , default risk , discount rates , and the overall capital market liquidity .insurance contracts insurance contracts are classified as level 3 assets , as they are carried at contract value , which approximates the estimated fair value .the estimated fair value is based on the fair value of the underlying investment of the insurance company .contributions and projected benefit payments pension contributions to funded plans and benefit payments for unfunded plans for fiscal year 2015 were $ 137.5 .contributions resulted primarily from an assessment of long-term funding requirements of the plans and tax planning .benefit payments to unfunded plans were due primarily to the timing of retirements and cost reduction actions .we anticipate contributing $ 100 to $ 120 to the defined benefit pension plans in 2016 .these contributions are driven primarily by benefit payments for unfunded plans , which are dependent upon timing of retirements and actions to reorganize the business .projected benefit payments , which reflect expected future service , are as follows: .
[['', 'u.s .', 'international'], ['2016', '$ 129.0', '$ 52.0'], ['2017', '135.8', '53.5'], ['2018', '142.2', '55.3'], ['2019', '149.6', '57.5'], ['2020', '157.4', '57.8'], ['2021 20132025', '917.9', '332.3']]
these estimated benefit payments are based on assumptions about future events .actual benefit payments may vary significantly from these estimates. .

Question: considering the average for the years 2021-2025 , what is the increase observed in the projected benefit payments for the u.s during 2020 and 2021?
Answer: 16.63%
Explanation: it is the 2021 projected benefit payment divided by the 2020s , which is calculated through the average formula , then turned into a percentage.\\n