The part of the sentence "has been annually increasing" is correct and usable in written English.
You can use it to talk about something that has been steadily getting larger or more frequent over a period of time measured in years. For example, "The cost of living in this city has been annually increasing for the last five years."
Morbidity had been annually decreasing from 2006 to 2009 but had been increasing since 2010 (Table 1).
The 1970-2010 annuale annual income for Botswana citizens has been increasing annually by 6.3percentt, compared to high-income countries averaging annual growth of approximately 1.8percentt for the same 40-year period.
According to the report of the National Institute of Infectious Disease, the number of cases of E. histolytica infection has been increasing annually, particularly since 2000, and this has been attributed to an increase in sexually transmitted cases.
The number of cases of gonorrhoea reported to the ECDC has been increasing annually since 2008; 52,995 cases were reported in 2013, which is an 11%% increase from the previous year (47,641 cases in 2012) [ 42].
The risk factors for thrombosis are abnormal hyperlipid, hyperglycemia, elevated plasma fibrinogen, high blood pressure and cancer, these thrombotic diseases, have become the primary causes of death and their incidence has been increasing annually [14, 15].
The city of Brisbane has a population of approximately two million people, which has been increasing annually by approximately two percent for the last two decades [ 30].
Canada has one of the highest per capita rates of consumption of IVIG in the world, and the consumption rate has been increasing annually over the past decade[ 16, 17].
The usage of these drugs has been increasing annually and during 2000 and 2001 approximately 70 80% of patients regularly attending CDC were taking some form of anti-retroviral therapy.
