Litres (in millions) of alcohol available for consumption-Multiplicative model Total volume of All Beverages available for consumption: volume of beer available for consumption: The overall trend for the total volume of beer available for consumption, shown in the time series plot and the Decomposition graph, show a gradual decrease from 3.8 million litres to 3 million litres. The trend line gradually decreases from 1985 to 1997. It then remains relatively constant, with a slight increase around 2008. From 2008 a relatively moderate decrease can be seen before remaining relatively constant. This decrease may be due to people choosing other types of beverages, as over the years many more options have become available. Looking at the seasonal pattern of the Decomposition graph, the amplitude seems to be slightly decreasing, suggesting a decrease in the volume of beer available for consumption in New Zealand since 1985. The variation of the seasonal pattern ranges between 0 and 1. The seasonal component displayed in the Multiplicative seasonal effects graph shows a high peak in quarter 4 (October- December), followed by a steep decrease in the following quarter (1). The component then decreases further in quarter 2 and then reaching its minimum in quarter 3. The component then shoots back up to its peak from quarter 3 to 4. The high volume of beer available for consumption in quarter 4 is most likely due to the Christmas and New Year holiday, as many people drink more at this time. In addition, because of the summer season, beer is considered a nice cool beverage on hot days, however this should be further investigated. The residuals in the Decomposition graph show no particular pattern. Overall, the residuals have varied between 0.2 and -0.6 since 1985. It is small compared to the trend, and the seasonal component. In addition there is an obvious minimum around 1987, which should be further investigated. Total volume of Spirits available for consumption:
Litres (in millions) of alcohol available for consumption-Multiplicative model Total volume of All Beverages available for consumption: volume of beer available for consumption: The overall trend for the total volume of beer available for consumption, shown in the time series plot and the Decomposition graph, show a gradual decrease from 3.8 million litres to 3 million litres. The trend line gradually decreases from 1985 to 1997. It then remains relatively constant, with a slight increase around 2008. From 2008 a relatively moderate decrease can be seen before remaining relatively constant. This decrease may be due to people choosing other types of beverages, as over the years many more options have become available. Looking at the seasonal pattern of the Decomposition graph, the amplitude seems to be slightly decreasing, suggesting a decrease in the volume of beer available for consumption in New Zealand since 1985. The variation of the seasonal pattern ranges between 0 and 1. The seasonal component displayed in the Multiplicative seasonal effects graph shows a high peak in quarter 4 (October- December), followed by a steep decrease in the following quarter (1). The component then decreases further in quarter 2 and then reaching its minimum in quarter 3. The component then shoots back up to its peak from quarter 3 to 4. The high volume of beer available for consumption in quarter 4 is most likely due to the Christmas and New Year holiday, as many people drink more at this time. In addition, because of the summer season, beer is considered a nice cool beverage on hot days, however this should be further investigated. The residuals in the Decomposition graph show no particular pattern. Overall, the residuals have varied between 0.2 and -0.6 since 1985. It is small compared to the trend, and the seasonal component. In addition there is an obvious minimum around 1987, which should be further investigated. Total volume of Spirits available for consumption: