Here is a more structured way to present the data you've provided, filling in placeholders with typical values where appropriate. Please replace the placeholders with actual values as needed:
The temperature increased by 5 degrees Celsius.
The price of oil decreased from $70 in January to $50 in March.
The price of gold increased to $1,800 in April.
The blood sugar level fluctuated between 70 mg/dl and 140 mg/dl.
The price of gold peaked at $2,000/oz. in August.
The heartbeat remained steady at 70 bpm.
Apple's market value went above $2 trillion in 2021.
We have to cut spending by 15%.
Interest rates fell below 3% in September 2023.
We are seeing an increase of 10% in sales each year.
Feel free to edit any specific values based on the actual data you might be preparing for your university exams!