in 2017 what was the percent of the total amortization expense that was due in 2019
Important information:
text_1: notes to consolidated financial statements 2014 ( continued ) amortization expense for other intangible assets was approximately $ 75 million in 2017 , $ 77 million in 2016 , and $ 93 million in 2015 .
table_2: the 2018 of ( in millions ) is $ 64 ;
table_3: the 2019 of ( in millions ) is 54 ;
Reasoning Steps:
Step: add2-1(64, 54) = 118
Step: add2-2(52, #0) = 170
Step: add2-3(#1, 19) = 189
Step: add2-4(#2, 16) = 205
Step: divide2-5(54, #3) = 26.3%
Program:
add(64, 54), add(52, #0), add(#1, 19), add(#2, 16), divide(54, #3)
Program (Nested):
divide(54, add(add(add(52, add(64, 54)), 19), 16))

Please answer the following financial question based on the context provided. Make sure to give the answer in raw number, not in percentage and without any units. If the question asks for percentage the value should be less than 1
Context:
humana inc . notes to consolidated financial statements 2014 ( continued ) amortization expense for other intangible assets was approximately $ 75 million in 2017 , $ 77 million in 2016 , and $ 93 million in 2015 . the following table presents our estimate of amortization expense for each of the five next succeeding fiscal years: .
Table
                                  | ( in millions )
for the years ending december 31, |                
2018                              | $ 64           
2019                              | 54             
2020                              | 52             
2021                              | 19             
2022                              | 16             
.
Question: 
in 2017 what was the percent of the total amortization expense that was due in 2019
Important information:
text_1: notes to consolidated financial statements 2014 ( continued ) amortization expense for other intangible assets was approximately $ 75 million in 2017 , $ 77 million in 2016 , and $ 93 million in 2015 .
table_2: the 2018 of ( in millions ) is $ 64 ;
table_3: the 2019 of ( in millions ) is 54 ;
Reasoning Steps:
Step: add2-1(64, 54) = 118
Step: add2-2(52, #0) = 170
Step: add2-3(#1, 19) = 189
Step: add2-4(#2, 16) = 205
Step: divide2-5(54, #3) = 26.3%
Program:
add(64, 54), add(52, #0), add(#1, 19), add(#2, 16), divide(54, #3)
Program (Nested):
divide(54, add(add(add(52, add(64, 54)), 19), 16))
