What was the percentage change in revenues reported as long-term between 2018 and 2019?
{"Deferred product revenue": {"April 26, 2019": 84, "April 27, 2018": 107}, "Deferred services revenue": {"April 26, 2019": 3502, "April 27, 2018": 3134}, "Financed unearned services revenue": {"April 26, 2019": 82, "April 27, 2018": 122}, "Total": {"April 26, 2019": 3668, "April 27, 2018": 3363}, "Reported as: -- Short-term": {"April 26, 2019": 1825, "April 27, 2018": 1712}, "Reported as: -- Long-term": {"April 26, 2019": 1843, "April 27, 2018": 1651}, "Reported as: -- Total": {"April 26, 2019": 3668, "April 27, 2018": 3363}}
revenue_2019 = df["Reported as: -- Long-term"]["April 26, 2019"]
revenue_2018 = df["Reported as: -- Long-term"]["April 27, 2018"]
answer = (revenue_2019 - revenue_2018) / revenue_2018 * 100.0