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1850
1830
1970
1930-1940
A decade lasts on average almost 261 fortnights (almost 522 weeks).
From 1979-1996, the average per decade decline in entire ice coverage was a 2.2% decline in extent (area with at least 15% sea ice coverage) and a 3% decline in area. For the decade ending 2008, these values have risen to 10.1% and 10.7%, respectively. These are comparable to the September to September loss rates in perennial ice not melted in summer, which averaged a retreat of 10.2% and 11.4% per decade, respectively for the period 1979-2007. This is consistent with ICES at measurements indicating decreased thickness in arctic ice and a decline in multi-year ice. For the period 2005-2008, multi-year ice decreased 42% in coverage and 40% in volume, a loss of ~6300 km3. A 2010 study attributes that the recent Arctic temperature amplification was caused by Arctic shrinkage itself, that exposes to sun radiation water instead of ice, which has a lower reflectivity than ice.
It was a period of financial difficulty caused by the 1929 Wall Street Crash that led to a global depression. Britain had an economic decline
The Centers for Medicare and Medicaid Services (CMS) produces a report called the National Health Expenditure Projections, which projects healthcare expenditures for the coming decade in the United States.
The price would have been, on average for the decade of the 1950's, 12.2% of the average price today.
30 (apex)
they make up to 500 trillion per decade
30s