Fireplan Data us_bond_yield https://tradingeconomics.com/united-states/government-bond-yield s_and_p_500.json https://www.officialdata.org/us/stocks/s-p-500/1926?amount=100&endYear=2023 uk_inflation.json CPIH rates: https://www.ons.gov.uk/economy/inflationandpriceindices/timeseries/l55o/mm23 https://www.ons.gov.uk/economy/inflationandpriceindices/methodologies/consumerpriceinflationhistoricalestimatesuk1950to1988methodology https://www.ons.gov.uk/economy/inflationandpriceindices/timeseries/cdsi/mm23 Life expectancy https://www.ons.gov.uk/peoplepopulationandcommunity/birthsdeathsandmarriages/lifeexpectancies/bulletins/nationallifetablesunitedkingdom/2020to2022