Expand the following content and ensure that the grammar conforms to academic normsShàng wén yǐjīng fēnxī dào kē chuàng bǎn zhǔyào fúwù yú fúhé guójiā zhànlüè túpò guānjiàn héxīn jìshù shìchǎng rènkě

From the establishment years of the Science and Technology Innovation Board, it can be seen that the average establishment year of innovative companies listed on the board is 12.7 years. Among them, companies established for less than 10 years accounted for 19.17% of the total, while those established between 10 and 15 years accounted for 32.91%, and those established between 15 and 20 years accounted for 37.06%. Companies with establishment years exceeding 20 years accounted for only 10.86% of the total. The annual revenue of these enterprises increases steadily, and the proportion of enterprises with establishment years exceeding 20 years has reached 89.14%. Among them, the longest establishment year is 37 years, and the shortest is 4 years. The Science and Technology Innovation Board has provided a platform for growth and development for innovative enterprises with a focus on technological innovation and national strategy