Given below are hypothetical figures in regard to population (in crores) of two countries X and Y during the last three decades.

From the above data complete the following sentences :
(i) Rate of growth of population of country ............. has declined between years ............. and ..............
(ii) the country ........... shows negative population growth between years .......... and ............
(iii) The country ............ shows positive population growth between years ......... and .......... .