Why is "Economy of South India" trending?

Wikipedia Overview

The economy of South India after independence in 1947 conformed to a socialist framework, with strict governmental control over private sector participation, foreign trade and foreign direct investment (FDI). Through 1960s–1990s, South Indian economies experienced mixed economic growth. In the 1960s, Kerala achieved above-average economic growth, while Andhra Pradesh's economy declined during this period. Similarly, Kerala experienced an economic decline in the 1970s while the economies of Tamil Nadu, Andhra Pradesh, and Karnataka consistently exceeded national average growth rates after 1970. South India first started to overtake the rest of India economically in the 1980s. Andhra Pradesh, Tamil Nadu and Karnataka were noted by some to be more reform-oriented in terms of economic policy when compared to other Indian states. Over the last decade South India has grown at 8% annually. Future savings may be negatively impacted by a growth in an aging population in South Indian states, as the aging population will require more money for healthcare expenses. However, this will not severely impact state domestic product as India's overall population is also expected to decline. Today, South India has about 20% of India's population, and contributes about 31% of India's GDP; it is projected to contribute 35% by 2030.