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
2021–2025
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: Analyse this data from a financial earnings document. 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?
Choices:
0.16633
-331.13367
1.91582
1.16633
339.98
Correct choice index: 0