Why do 65% invention patents come from small and medium-sized enterprises?

Small and medium-sized enterprises are relatively few, and many of them are technicians and all-rounders. Sales will give him the market things in time, and the boss will follow closely, with high efficiency and slow efficiency of large enterprises. A thing needs several audits and several signatures, and few awesome people can say it! Besides, awesome people don't have a high status in big companies, and they will also come out to do their own work. They have their own core technology and do their own work. Of course they will get twice the result with half the effort!