Fiscal year
Fiscal year
Fiscal year
% Change
(in millions of €)
2019
2018
Actual
Comp.
Orders
12,894
11,025
17 %
16 %
Revenue
8,916
8,821
1 %
0 %
Adjusted EBITA
983
958
3 %
Adjusted EBITA margin
11.0 %
10.9 %
orders at mobility grew to a record high on a sharp increase in volume from large orders which the strategic company won across the businesses most notably in the rolling stock and the customer services businesses .
among the major contract wins were a € 1 .
6 billion order for metro trains in the u .
k .
a € 1 .
2 billion contract for high-speed trains including maintenance in russia a € 0 .
8 billion order for trainsets including service in canada a € 0 .
7 billion contract for diesel-electric locomotives including a service agreement in the u .
s .
and two orders in germany worth € 0 .
4 billion and € 0 .
3 billion respectively for regional multiple-unit trainsets .
in fiscal 2018 mobility also gained a number of significant contracts across the regions .
revenue grew slightly as double-digit growth in the customer services business was largely offset by a decline in the rail infrastructure business .
revenue in the rolling stock business remained close to the prior-year level due to unfavorable timing effects related to the execution of large rail projects which the business began to ramp up late in the fiscal year .
mobility continued to operate with high profitability in fiscal 2019 including a strong contribution to adjusted ebita from the services business .
severance charges were € 20 million up from € 14 million in fiscal 2018 .
mobility ’ s order backlog was € 33 billion at the end of the fiscal year of which € 8 billion are expected to be converted into revenue in fiscal 2020 .
order growth reflected overall strong markets for mobility in fiscal 2019 with different dynamics among the regions .
market development in europe was characterized by continuing awards of mid-size and large orders particularly in the u .
k .
germany and austria .
within the c .
i .
s .
large projects for high-speed trains and services were awarded in russia .
demand in the middle east and africa was held back by ongoing uncertainties related to budget constraints and political climates .
in the americas region stable investment activities were driven by demand for mainline and urban transport especially in the u .
s .
and canada .
within the asia australia region chinese markets saw ongoing investments in high-speed trains urban transport freight logistics and rail infrastructure while india continues to invest in modernizing the country ’ s transportation infrastructure .
for fiscal 2020 we expect markets served by mobility to grow moderately with increasing demand for digital solutions .
overall rail transport and intermodal mobility solutions are expected to remain a focus as urbanization continues to progress around the world .
in emerging countries rising incomes are expected to result in greater demand for public transport solutions .

Question: What was the reason for the increase in the Revenue?
Answer: Revenue grew slightly as double-digit growth in the customer services business was largely offset by a decline in the rail infrastructure business.