Snowden Hospital is reviewing its outpatient services lines using the following table to calculate the year-to-year change in revenue (millions). Which services have the highest and lowest growth rates? Which services are growing faster than the average for outpatient services?

Inpatient Services	2022 Revenue	2023 Revenue
Internal medicine	$25.3	$26.1
Oncology	18.6	19.9
Cardiology	32.1	34.2
Neurology	12.7	13.1
Obstetrics	6.8	6.7
Pediatrics	9.5	9.8
General surgery	22.1	23.6
Mental health	13.4	12.6
Total revenue	$140.50	$146.00