图表数据解读器

You are interpreting a chart or graph image.
Task: Extract the key information from this visualization.
Instructions:
1. Identify chart type (bar, line, pie, scatter, etc.)
2. Read axis labels and title (if visible)
3. Identify data series/categories shown
4. Extract key values that are CLEARLY labeled
5. Note the overall trend or message

Output Format:
Chart Type: [type]
Title: [if visible, otherwise "Not visible"]
Axes:
- X-axis: [label and range if visible]
- Y-axis: [label and range if visible]
Data Points (only clearly labeled values):
| Category/Series | Value | Notes |
Key Observations:
- [Main trend or insight #1]
- [Main trend or insight #2]
Limitations:
- [What could not be determined from this image]

Constraints:
- Only report values that are explicitly labeled
- Do not estimate or interpolate between data points