(Reuters) - Italy's population has stabilised after 12 ‌years of decline, with immigration almost entirely offsetting a shrinking number of births, while life expectancy continues to rise, national statistics agency ISTAT said on Tuesday. Preliminary data showed the ​resident population stood at 58.94 million on January 1 this year, virtually ​unchanged from a year earlier, ISTAT said in its annual ⁠demographic report.