New Zealand has been witnessing an increase in the movement of migrants from Australia the last few months, but the level has risen to a significant level for the first time since 1991.

Statistics New Zealand figures released on Monday indicated a net migration of 64,900 people in 2015 until December 31. The latest rise in influx of Australians into New Zealand has marked the third month in a row of annual net migration level, making it the first instance the past 24 years.

Among the total number of migrants, 25,273 were Australian, of which two-thirds were New Zealanders who returned from Australia and back to their native land. On the other hand, the total number of people moving from New Zealand to Australia was 24,504, which made the net flow of Australians to NZ limit to 769 people. Net flow means the long-term residents of New Zealand minus those migrating to other nations.

ANZ said that there was a possibility of more migrant arrivals in October and November, which might have resulted in more than 6,000 migrations per month, leading to the increase in influx at above average levels. “With NZ looking better than most around the globe and still set to outshine Australia, we expect migration to remain strong,” ANZ chief economist Cameron Bagrie said as quoted by Stuff New Zealand.

In 2015, New Zealand recorded the entry of 121,900 migrants, while the departure count was at 57,000 migrants. According to reports, the changes in visa rules that allowed students to work part time has acted as a driving force in pulling students from India. The recorded influx was 14,500 people from India, of which two-thirds entered the nation on student visas.

According to BBC, the reason behind such a huge shift in the Australia-NZ population is the stopping of mining in Australia as well as increasing economic and political stability in New Zealand. Last week, the Reserve Bank of New Zealand Governor Graeme Wheeler said that construction activity to welcome tourists and enhancement in business and consumer confidence will prompt significant growth in 2016.