We present the results of measurements of the solar neutrino capture rate in gallium metal by the Russian-American Gallium Experiment SAGE during slightly more than half of a 22-year cycle of solar activity .
Combined analysis of the data of 92 runs during the 12-year period January 1990 through December 2001 gives a capture rate of solar neutrinos with energy more than 233 keV of 70.8 ^ { +5.3 } _ { -5.2 } ( stat . ) ^ { +3.7 } _ { -3.2 } ( syst . )
SNU .
This represents only slightly more than half of the predicted standard solar model rate of 128 SNU .
We give the results of new runs beginning in April 1998 and the results of combined analysis of all runs since 1990 during yearly , monthly , and bimonthly periods .
Using a simple analysis of the SAGE results combined with those from all other solar neutrino experiments , we estimate the electron neutrino pp flux that reaches the Earth to be ( 4.6 \pm 1.1 ) \times 10 ^ { 10 } / ( cm ^ { 2 } -s ) .
Assuming that neutrinos oscillate to active flavors the pp neutrino flux emitted in the solar fusion reaction is approximately ( 7.7 \pm 1.8 ) \times 10 ^ { 10 } / ( cm ^ { 2 } -s ) , in agreement with the standard solar model calculation of ( 5.95 \pm 0.06 ) \times 10 ^ { 10 } / ( cm ^ { 2 } -s ) .