I’m not sure, either ;-)
What's discouraging is, despite wherever California was then, it's well below that level today. China, India, Mexico, Russia, Brazil and Italy have all surpassed CA, although California's own population growth has exceeded or met the growth in those other countries, save for China and India. California has all but lost it's industrial base, and that hurts its economic fortune more than anything.
Incidentally, I forgot Japan. Japan's economy was bigger than California back in Reagan's day.