Statements of Social Insurance and Changes in Social Insurance Amounts
| United States Government Statements of Changes in Social Insurance Amounts for the Year Ended September 30, 2018 (Note 22) | |||||
|---|---|---|---|---|---|
| (In trillions of dollars) | Social Security 1 | Medicare HI 1 | Medicare SMI 1 | Other 2 | Total |
| Net present value (NPV) of future revenue less future expenditures for current and future participants (the "open group") over the next 75 years, beginning of the year | (15.4) | (3.5) | (30.0) | (0.1) | (49.0) |
| Reasons for changes in the NPV during the year: | |||||
| Changes in valuation period | (0.6) | (0.2) | (1.1) | - | (1.9) |
| Changes in demographic data, assumptions, and methods | 0.1 | 0.4 | 0.2 | - | 0.7 |
| Changes in economic data, assumptions, and methods | (0.5) | - | - | - | (0.5) |
| Changes in law or policy | - | (0.5) | (0.5) | - | (1.0) |
| Changes in methodology and programmatic data | 0.2 | - | - | - | 0.2 |
| Changes in economic and other health care assumptions | - | - | (1.5) | - | (1.5) |
| Change in projection base | - | (0.9) | - | - | (0.9) |
| Net change in open group measure | (0.8) | (1.2) | (2.9) | - | (4.8) |
| Open group measure, end of year | (16.1) | (4.7) | (32.9) | (0.1) | (53.8) |
| 1Amounts represent changes between valuation dates 1/1/2017 and 1/1/2018. | |||||
| 2Includes Railroad Retirement changes between valuation dates 10/1/2016 and 10/1/2017 and Black Lung changes between 9/30/2017 and 9/30/2018. | |||||
Totals may not equal the sum of components due to rounding. | |||||
| The accompanying notes are an integral part of these financial statements. | |||||
| United States Government Statements of Changes in Social Insurance Amounts for the Year Ended September 30, 2017 (Note 22) | |||||
|---|---|---|---|---|---|
| (In trillions of dollars) | Social Security 1 | Medicare HI 1 | Medicare SMI 1 | Other 2 | Total |
| Net present value (NPV) of future revenue less future expenditures for current and future participants (the "open group") over the next 75 years, beginning of the year | (14.1) | (3.8) | (28.7) | (0.1) | (46.7) |
| Reasons for changes in the NPV during the year: | |||||
| Changes in valuation period | (0.6) | (0.2) | (1.2) | - | (2.0) |
| Changes in demographic data, assumptions, and methods | (0.1) | (0.1) | - | - | (0.2) |
| Changes in economic data, assumptions, and methods | (0.6) | - | - | - | (0.6) |
| Changes in law or policy | - | - | - | - | - |
| Changes in economic and other health care assumptions | - | 0.2 | (0.5) | - | (0.3) |
| Change in projection base | - | 0.3 | 0.4 | - | 0.7 |
| Net change in open group measure | (1.2) | 0.3 | (1.4) | - | (2.3) |
| Open group measure, end of year | (15.4) | (3.5) | (30.0) | (0.1) | (49.0) |
| 1Amounts represent changes between valuation dates 1/1/2016 and 1/1/2017. | |||||
| 2Includes Railroad Retirement changes between valuation dates 10/1/2015 and 10/1/2016 and Black Lung changes between 9/30/2016 and 9/30/2017. | |||||
| Totals may not equal the sum of components due to rounding. | |||||
| The accompanying notes are an integral part of these financial statements. | |||||