Planetary distribution of ionosphere ionization rate by Galactic Cosmic Rays (GCR): How it changed with time from 1950 up to expected at 2050 due to variations of CR penumbra functions and cutoff rigidities with taking into account time variations of GCR spectrum?

We use results on the trajectory calculations of planetary distribution CR penumbra function (equal to 1 for allowed CR trajectories and 0 for forbidden trajectories) and calculations of corresponding variations of CR effective cutoff rigidities Rc for each 5 years during 1950 - 2050 (1950, 1955, and so on, up to 2050) with taking into account changes of primary rigidity GCR spectrum due to modulation in the Heliosphere. Based on these results we determine how changed the flux of GCR and corresponding ionization rate in low ionosphere (where GCR is the one of main sources of ionization) due to time variations of Rc for the same each 5 years during 1950 - 2050 in dependence of latitude and longitude. Obtained results are important for more exact determining influence of GCR on ionosphere and radio-wave propagation in 1950 - 2015 and forecasting of expected influence up to 2050. For solar CR events (with different primary energetic spectrums) obtained results give possibility to calculate and forecast more exactly their influence on ionosphere and radio-wave propagation finally caused by processes on the Sun, by Space Weather effects, and by processes deep inside the Earth.