Vertical bars, two for each group yesterday and today, groups across the bottom.
With a target line higher than 80%. And fireworks. Gotta have fireworks when the target is reached, right at the top of the bar.
Then, put it on billboards all across the state.
Use those digital ones and alternate with the Powerball and Lotto ads.
Maybe enter everyone vaccinated in a raffle, 5 prize levels. First group to get to 85%, winner of the first target picked from that group. Second group, picked for second prize. The first two would already be gone, but a strong showing from 55-64 and they could pass 85+, a sprint from one of the younger groups could still beat them both. Make the prizes big, something like $50k, $40k, $30k, $20k, $10k. Still cheaper than just paying everyone, and people love a chance at the big payoff. Gotta play to win.
People love a good competition. Think of the secondary markets then. Vegas could open a betting line on which group get there next. Place a bet on your own group getting there and then get vaccinated to push them over the top!