Please translate the given English sentence to Hindi
यूनिवर्सिटी ऑफ मेरीलेंड के प्रोफेसर जुलियन साइमन बताते हैं कि हांगकांग, सिंगापुर, हालैंड एवं जापान जैसे जनसंख्या-सघन देशों की आर्थिक विकास दर अधिक है जबकि जनसंख्या न्यून।
Professor Julian Simon at University of Maryland notes that densely populated countries like Holland, Hong Kong, Japan and Singapore have had high rates of growth while sparsely populated Africa has had low rates of growth.