Enhance the existing Birth Year Histogram by adding interactive tooltips. While the basic chart shows the general distribution, users should be able to see the exact count for each decade by hovering over the bars.

Requirements:

Data Fetching: Fetch 200 random years from the Random.org API.
Interactive Tooltips:
- When a user hovers over a bar, a tooltip must appear.
- The tooltip should display the exact count (e.g., "Count: 32").
- The tooltip should be positioned centered above the bar.
Visual Styling:
- Tooltips should have a dark background with light text.
- Add a slight scaling or opacity change to the bar itself during hover.
Layout Consistency: Ensure the tooltips do not push the chart content down or cause "flickering" when appearing.

API URL: https://www.random.org/integers/?num=200&min=1950&max=2019&col=1&base=10&format=plain&rnd=new